{"title":"Pool Water Balancers","description":"\u003cp\u003eShop pH, alkalinity and calcium hardness adjustments for pool water care. Test the water before selecting a treatment and follow the product label. Check individual products for spa suitability.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 24px\"\u003e\n\u003ca href=\"\/collections\/pool-spa-water-testing\" style=\"display:inline-block;padding:12px 14px;border:1px solid #d5e3ee;border-radius:6px;background:#f2f7fb;color:#0f4686;font-weight:600;text-decoration:none;line-height:20px\"\u003ePool \u0026amp; Spa Water Testing\u003c\/a\u003e\u003ca href=\"\/collections\/pool-chlorine-sanitisers\" style=\"display:inline-block;padding:12px 14px;border:1px solid #d5e3ee;border-radius:6px;background:#f2f7fb;color:#0f4686;font-weight:600;text-decoration:none;line-height:20px\"\u003ePool Chlorine \u0026amp; Sanitisers\u003c\/a\u003e\n\u003c\/div\u003e","products":[{"product_id":"alkalinity-increaser-1kg","title":"Alkalinity Increaser Sodium Bicarbonate 1kg | Pool \u0026 Spa","description":"\u003cp\u003e\u003cstrong\u003epH swings making your pool or spa impossible to balance?\u003c\/strong\u003e Alkalinity Increaser (Sodium Bicarbonate) is the essential buffer that keeps your water stable, stopping pH from bouncing up and down every time you add chemicals, it rains, or bather load changes.\u003c\/p\u003e\n\u003cp\u003eThe 1kg pail is the perfect size for spa owners, small pools, or anyone who wants a top-up supply on hand. Without adequate Total Alkalinity, pH becomes impossible to control, chlorine loses effectiveness, water turns corrosive, and your equipment pays the price.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bicarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-120 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-150 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bicarbonate Formula.\u003c\/strong\u003e The gold standard for raising Total Alkalinity without significantly affecting pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH-Neutral Action.\u003c\/strong\u003e Raises Total Alkalinity while keeping pH movement minimal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Disperses quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects Equipment.\u003c\/strong\u003e Prevents corrosion of pumps, heaters, and fittings caused by low Total Alkalinity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e30g per 1,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003eRun jets while adding for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1.5kg per 50,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with the pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always adjust Total Alkalinity before adjusting pH. Getting Total Alkalinity right first makes pH much easier to control. Test with strips before and after every dose.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1kg Pail (this product)\u003c\/strong\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/alkalinity-increaser-pool-spa-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-increaser-1kg-soda-ash-spa-pool\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 1kg\u003c\/strong\u003e\u003c\/a\u003e - once Total Alkalinity is correct, use to fine-tune pH up to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct Total Alkalinity and pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test Total Alkalinity, pH, and chlorine before and after every dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Alkalinity Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between alkalinity and pH?\u003c\/strong\u003e\u003cbr\u003eA: Total Alkalinity is the buffer that keeps pH stable. Think of it as the anchor, without it pH drifts constantly. Always correct Total Alkalinity first, then adjust pH.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Alkalinity Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: It begins working within minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add Alkalinity Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, adjust alkalinity first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if my Total Alkalinity is too high?\u003c\/strong\u003e\u003cbr\u003eA: High Total Alkalinity (above 150 ppm) is corrected by adding a pH Decreaser (Sodium Bisulphate) and aerating the water. Test regularly to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 1kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 1,000L spa needing a 30 ppm raise in Total Alkalinity, you need approximately 90g. A 1kg pail provides roughly 11 full treatments, or many more for small top-up doses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool and spa types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":35456690127001,"sku":"CHEM-ALK-BICARB-1KG","price":14.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/IMG-2632_4af9a8f8-5415-4485-9dbc-70930dc23009.png?v=1774497493"},{"product_id":"calcium-hardness-increaser-1kg","title":"Calcium Hardness Increaser 1kg | Calcium Chloride Spa \u0026 Pool","description":"\u003cp\u003e\u003cstrong\u003eSoft water foaming up your spa or corroding your equipment?\u003c\/strong\u003e Calcium Hardness Increaser (Calcium Chloride) is the essential treatment that protects your spa shell, heater, jets, and fittings from the damaging effects of low-calcium water - while eliminating the foaming and etching that soft water causes.\u003c\/p\u003e\n\u003cp\u003eThe 1kg pail is the perfect size for spa owners and hot tub users. Water with low calcium hardness is aggressive - it actively leaches calcium from your spa surfaces and equipment. The result is pitting, etching, foaming, and costly equipment damage. A correct calcium hardness level of 150-250 ppm is your first line of defence.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCalcium Chloride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e1kg resealable pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSpa pools, hot tubs, swim spas, and swimming pools\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e15g per 1,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e300g per 20,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e150-250 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e200-400 ppm (varies by surface type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy Calcium Hardness Matters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eToo low - water becomes corrosive, etches surfaces, causes foaming, damages heaters and pumps\u003c\/li\u003e\n\u003cli\u003eToo high - water turns cloudy, scale deposits form on surfaces and fittings\u003c\/li\u003e\n\u003cli\u003eCorrect calcium hardness = protected equipment, clear water, and longer spa life\u003c\/li\u003e\n\u003cli\u003eIdeal range for spas: 150-250 ppm | Ideal range for pools: 200-400 ppm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Ingredient: Calcium Chloride.\u003c\/strong\u003e The industry standard for raising calcium hardness quickly and evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Raises calcium hardness quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for spa pools, hot tubs, swim spas, and swimming pools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects heater elements, pumps, jets, and fittings from soft water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces Foaming.\u003c\/strong\u003e Eliminates foaming caused by soft, low-calcium water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1kg Resealable Pail.\u003c\/strong\u003e Ideal size for spas and hot tubs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools and Hot Tubs (per 1,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e15g per 1,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003eExample: 150g raises calcium by 100 ppm in a 1,000L spa\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of warm water before adding - solution will heat up, this is normal\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools (per 20,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e300g per 20,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to pool\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color: #fff8e1; border-left: 4px solid #ffa000; padding: 15px; margin: 20px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always pre-dissolve Calcium Chloride in a bucket of water before adding - never add directly as it can cause localised cloudiness. The solution will get warm - this is a normal exothermic reaction. Always add chemical to water, not water to chemical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1kg Pail (this product)\u003c\/strong\u003e - ideal for spas, hot tubs, or small top-up doses.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-4kg\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool and spa maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety and Storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStore in a cool, dry place away from direct sunlight and moisture\u003c\/li\u003e\n\u003cli\u003eKeep away from children and pets\u003c\/li\u003e\n\u003cli\u003eDo not mix with other pool chemicals\u003c\/li\u003e\n\u003cli\u003ePre-dissolving causes heat - use a plastic bucket and handle with care\u003c\/li\u003e\n\u003cli\u003eAvoid inhaling dust - use in a well-ventilated area\u003c\/li\u003e\n\u003cli\u003eWash hands thoroughly after handling\u003c\/li\u003e\n\u003cli\u003eRefer to the Safety Data Sheet (SDS) for full handling instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test calcium hardness, pH, chlorine, and alkalinity before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity alongside calcium for fully balanced water.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-increaser-1kg-soda-ash-spa-pool\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 1kg\u003c\/strong\u003e\u003c\/a\u003e - adjust pH to the ideal 7.2-7.8 range after balancing calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Calcium Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does my spa foam so much?\u003c\/strong\u003e\u003cbr\u003eA: Foaming is one of the most common signs of low calcium hardness. Raise calcium to 150-250 ppm and the foaming will reduce significantly. Also check for body oils and detergent residue from swimwear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Calcium Hardness Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: Calcium dissolves and disperses within a few hours. Allow 6 hours of full circulation before retesting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does the solution get hot when I pre-dissolve it?\u003c\/strong\u003e\u003cbr\u003eA: Calcium Chloride is exothermic - it releases heat when dissolved in water. This is completely normal. Always use a plastic bucket and add the chemical to water, not water to the chemical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add too much calcium?\u003c\/strong\u003e\u003cbr\u003eA: Yes - calcium above 250 ppm in spas causes cloudy water and scale deposits. Dose gradually and retest before adding more. High calcium can only be corrected by diluting with fresh water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 1kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 1,000L spa starting at 100 ppm and targeting 200 ppm, you need approximately 150g. A 1kg pail provides roughly 6-7 full treatments from scratch, or many more for small top-up doses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all spa types?\u003c\/strong\u003e\u003cbr\u003eA: Yes - safe for acrylic, fibreglass, and inflatable spa pools, and all hot tub types when used as directed.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003eNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003eQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":35456707625113,"sku":"CHEM-CAL-INC-1KG","price":14.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/Perfect_Pools_Calcium_Hardness_Increaser_1kg_Bucket.png?v=1776656455"},{"product_id":"spa-pool-ph-decrease-1kg","title":"pH Decreaser Sodium Bisulphate 1kg | Pool \u0026 Spa pH Down","description":"\u003cp\u003e\u003cstrong\u003epH creeping too high in your spa or pool?\u003c\/strong\u003e pH Decreaser (Sodium Bisulphate) is the fast, reliable way to bring pH back into the ideal range, protecting your swimmers from irritation, keeping your chlorine effective, and preventing scale buildup on equipment and surfaces.\u003c\/p\u003e\n\u003cp\u003eThe 1kg pail is the perfect size for spa owners, small pools, or anyone who wants a top-up supply on hand. When pH rises above 7.6, chlorine loses up to 90% of its effectiveness and water turns cloudy. A quick dose of Sodium Bisulphate brings it right back into range.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bisulphate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types including saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bisulphate Formula.\u003c\/strong\u003e Fast-acting granular pH reducer, the industry standard for lowering pool and spa pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e pH begins dropping within 30-60 minutes of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Scale Buildup.\u003c\/strong\u003e Stops calcium deposits forming on pool surfaces and fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosts Chlorine Efficiency.\u003c\/strong\u003e Chlorine works best at correct pH levels, maximising sanitiser value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e10g per 1,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a small bucket of water before adding\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003ePour near the skimmer or return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Target 7.2-7.6 for pools, 7.2-7.8 for spas. Dose gradually, it is easier to add more than to correct an overshoot. Sodium Bisulphate is corrosive, wear gloves when handling.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1kg Pail (this product)\u003c\/strong\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-decrease-4kg\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-decrease-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-increaser-1kg-soda-ash-spa-pool\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 1kg\u003c\/strong\u003e\u003c\/a\u003e - use when pH drops too low and needs raising back to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test pH, chlorine, and alkalinity before and after every dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Decreaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins dropping within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Decreaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much and pH drops too low?\u003c\/strong\u003e\u003cbr\u003eA: Use pH Increaser (Soda Ash) to bring it back up. Always dose gradually and retest before adding more to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 1kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 1,000L spa dosed at 10g to lower pH by 0.5, a 1kg pail provides approximately 100 doses, plenty for a full season of regular adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is my pH always rising?\u003c\/strong\u003e\u003cbr\u003eA: Common causes include saltwater chlorinators, high Total Alkalinity, and aeration from jets or waterfalls. Check your Total Alkalinity first, if it is above 120 ppm, lowering it will help stabilise pH naturally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Sodium Bisulphate safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types when used as directed.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":35456840302745,"sku":"CHEM-PH-DOWN-BISULPH-1KG","price":15.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/IMG-2626.png?v=1774495688"},{"product_id":"ph-increaser-1kg-soda-ash-spa-pool","title":"pH Increaser Soda Ash 1kg | Pool \u0026 Spa pH Up","description":"\u003cp\u003e\u003cstrong\u003eLow pH making your pool or spa uncomfortable?\u003c\/strong\u003e pH Increaser (Soda Ash) is the fast, reliable way to raise pH in swimming pools and spa pools, protecting your swimmers from irritation, keeping your chlorine effective, and preventing corrosion of equipment and surfaces.\u003c\/p\u003e\n\u003cp\u003eThe 1kg pail is the perfect size for spa owners, small pools, or anyone who wants to keep a top-up supply on hand. When pH drops below 7.2, chlorine loses up to 50% of its effectiveness and water becomes corrosive. A quick dose of Soda Ash fixes that fast.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Carbonate (Soda Ash)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Carbonate Formula.\u003c\/strong\u003e Fast-dissolving Soda Ash raises pH reliably without overcorrecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e pH begins rising within 30-60 minutes of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects pool shell, fittings, and equipment from acidic water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosts Chlorine Efficiency.\u003c\/strong\u003e Chlorine works best at correct pH levels, maximising sanitiser value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1 teaspoon (approx. 7g) per 1,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003eDose gradually, retest after 30 minutes before adding more\u003c\/li\u003e\n\u003cli\u003eAlways run jets while dosing for even distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of pump circulation, then retest\u003c\/li\u003e\n\u003cli\u003eApply near a return jet for best distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Target 7.2-7.6 for pools, 7.2-7.8 for spas. Never add more than the recommended dose in a single application.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1kg Pail (this product)\u003c\/strong\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pool-spa-ph-increaser-soda-ash-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test pH, chlorine, and alkalinity before and after every dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes pH Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins rising within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much?\u003c\/strong\u003e\u003cbr\u003eA: High pH (above 7.8) causes cloudy water and reduces chlorine effectiveness. Use a pH Decreaser (Sodium Bisulphate) to bring it back down.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 1kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 1,000L spa dosed at 1 teaspoon (7g) to raise pH by 0.5, a 1kg pail provides approximately 140 doses, more than enough for a full season of regular adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":35456844759193,"sku":"CHEM-PH-UP-SODAASH-1KG","price":15.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/pH_Increaser_1kg_Hero.png?v=1774493015"},{"product_id":"alkalinity-increaser-pool-spa-10kg","title":"Alkalinity Increaser Sodium Bicarbonate 10kg | Pool \u0026 Spa","description":"\u003cp\u003e\u003cstrong\u003eThe best value Total Alkalinity treatment for serious pool owners.\u003c\/strong\u003e Alkalinity Increaser 10kg is the bulk pail choice for NZ pool and spa owners who want stable, balanced water all season without constant reordering. Sodium Bicarbonate buffers pH swings, protects equipment, and keeps your chlorine working at full effectiveness.\u003c\/p\u003e\n\u003cp\u003eWithout adequate Total Alkalinity, pH becomes impossible to control, chlorine loses effectiveness, water turns corrosive, and your equipment pays the price. The 10kg pail gives you enough to treat large pools multiple times or maintain a spa for years.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bicarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e10kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-120 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-150 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1.5kg per 50,000L raises Total Alkalinity by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e30g per 1,000L raises Total Alkalinity by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bicarbonate Formula.\u003c\/strong\u003e The gold standard for raising Total Alkalinity without significantly affecting pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH-Neutral Action.\u003c\/strong\u003e Raises Total Alkalinity while keeping pH movement minimal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Disperses quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects Equipment.\u003c\/strong\u003e Prevents corrosion of pumps, heaters, and fittings caused by low Total Alkalinity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest Value 10kg Size.\u003c\/strong\u003e Lowest cost per kg in the range, ideal for large pools or frequent use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1.5kg per 50,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e30g per 1,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003eRun jets while adding for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always adjust Total Alkalinity before adjusting pH. Getting Total Alkalinity right first makes pH much easier to control. Test with strips before and after every dose.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/alkalinity-increaser-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kg Pail (this product)\u003c\/strong\u003e - best value for large pools, frequent use, or stocking up for the season.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test Total Alkalinity, pH, chlorine, and hardness before and after every dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - once Total Alkalinity is correct, use to fine-tune pH up to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct Total Alkalinity and pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Alkalinity Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between alkalinity and pH?\u003c\/strong\u003e\u003cbr\u003eA: Total Alkalinity is the buffer that keeps pH stable. Think of Total Alkalinity as the anchor, without it pH drifts constantly. Always correct Total Alkalinity first, then adjust pH.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Alkalinity Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: It begins working within minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add Alkalinity Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, adjust alkalinity first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if my Total Alkalinity is too high?\u003c\/strong\u003e\u003cbr\u003eA: High Total Alkalinity (above 150 ppm) is corrected by adding a pH Decreaser (Sodium Bisulphate) and aerating the water. Test regularly to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 10kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 50,000L pool needing a 10 ppm raise in Total Alkalinity, you need 1.5kg per treatment. A 10kg pail provides approximately 6-7 full pool treatments. For a 1,000L spa at 30g per dose, it provides over 330 doses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool and spa types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40104305623193,"sku":"CHEM-ALK-BICARB-10KG","price":50.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/10kg_Alkalinity_Increase.png?v=1776332780"},{"product_id":"calcium-hardness-increaser-10kg","title":"Calcium Hardness Increaser 10kg | Calcium Chloride Pool \u0026 Spa","description":"\u003cp\u003e\u003cstrong\u003eThe best value calcium hardness treatment for serious pool owners.\u003c\/strong\u003e Calcium Hardness Increaser 10kg is the bulk pail choice for NZ pool and spa owners who want protected equipment, foam-free water, and stable chemistry all season without constant reordering.\u003c\/p\u003e\n\u003cp\u003eWater with low calcium hardness is aggressive - it actively leaches calcium from your pool surfaces, grout, and equipment. The result is pitting, etching, foaming, and expensive equipment damage. The 10kg pail gives you enough to treat large pools multiple times or maintain a spa for years.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCalcium Chloride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e10kg resealable pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSwimming pools, spa pools, plunge pools, and hot tubs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e300g per 20,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e15g per 1,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e200-400 ppm (varies by surface type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e150-250 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy Calcium Hardness Matters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eToo low - water becomes corrosive, etches surfaces, causes foaming, damages heaters and pumps\u003c\/li\u003e\n\u003cli\u003eToo high - water turns cloudy, scale deposits form on surfaces and fittings\u003c\/li\u003e\n\u003cli\u003eCorrect calcium hardness = protected equipment, clear water, and longer pool life\u003c\/li\u003e\n\u003cli\u003eIdeal range for pools: 200-400 ppm | Ideal range for spas: 150-250 ppm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Ingredient: Calcium Chloride.\u003c\/strong\u003e The industry standard for raising calcium hardness quickly and evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Raises calcium hardness quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools, spa pools, plunge pools, and hot tubs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects pool shell, heater elements, pumps, and fittings from soft water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces Foaming.\u003c\/strong\u003e Eliminates foaming caused by soft, low-calcium water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kg Bulk Pail.\u003c\/strong\u003e Best value size, lowest cost per kg in the range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools (per 20,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e300g per 20,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003eExample: 1.5kg raises calcium by 50 ppm in a 20,000L pool\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to pool - solution will heat up, this is normal\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools (per 1,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e15g per 1,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003eExample: 150g raises calcium by 100 ppm in a 1,000L spa\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of warm water before adding\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color: #fff8e1; border-left: 4px solid #ffa000; padding: 15px; margin: 20px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always pre-dissolve Calcium Chloride in a bucket of water before adding - never add directly as it can cause localised cloudiness. The solution will get warm - this is a normal exothermic reaction. Always add chemical to water, not water to chemical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas, hot tubs, or small top-up doses.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-4kg\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool and spa maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kg Pail (this product)\u003c\/strong\u003e - best value for large pools, frequent use, or stocking up for the season.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety and Storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStore in a cool, dry place away from direct sunlight and moisture\u003c\/li\u003e\n\u003cli\u003eKeep away from children and pets\u003c\/li\u003e\n\u003cli\u003eDo not mix with other pool chemicals\u003c\/li\u003e\n\u003cli\u003ePre-dissolving causes heat - use a plastic bucket and handle with care\u003c\/li\u003e\n\u003cli\u003eAvoid inhaling dust - use in a well-ventilated area\u003c\/li\u003e\n\u003cli\u003eWash hands thoroughly after handling\u003c\/li\u003e\n\u003cli\u003eRefer to the Safety Data Sheet (SDS) for full handling instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test calcium hardness, pH, chlorine, and alkalinity before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity alongside calcium for fully balanced water.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - adjust pH to the ideal 7.2-7.6 range after balancing calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct chemistry for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Calcium Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does my spa foam so much?\u003c\/strong\u003e\u003cbr\u003eA: Foaming is one of the most common signs of low calcium hardness. Raise calcium to 150-250 ppm and the foaming will reduce significantly. Also check for body oils and detergent residue from swimwear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Calcium Hardness Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: Calcium dissolves and disperses within a few hours. Allow 6 hours of full circulation before retesting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does the solution get hot when I pre-dissolve it?\u003c\/strong\u003e\u003cbr\u003eA: Calcium Chloride is exothermic - it releases heat when dissolved in water. This is completely normal. Always use a plastic bucket and add the chemical to water, not water to the chemical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add too much calcium?\u003c\/strong\u003e\u003cbr\u003eA: Yes - calcium above 400 ppm in pools or 250 ppm in spas causes cloudy water and scale deposits. Dose gradually and retest before adding more. High calcium can only be corrected by diluting with fresh water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 10kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 50,000L pool needing a 50 ppm raise in calcium, you need approximately 3.75kg. A 10kg pail provides roughly 2-3 full pool treatments from scratch, or many more for top-up doses. For a 1,000L spa, a 10kg pail provides over 66 full treatments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes - safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types when used as directed.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003eNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003eQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40104313028761,"sku":"CHEM-CAL-INC-10KG","price":50.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/Perfect_Pools_Calcium_Increaser_10kg_Bucket.png?v=1776655701"},{"product_id":"pool-spa-ph-increaser-soda-ash-10kg","title":"pH Increaser Soda Ash 10kg | Sodium Carbonate | Pool \u0026 Spa pH Up","description":"\u003cp\u003e\u003cstrong\u003eThe best value pH treatment for serious pool owners.\u003c\/strong\u003e pH Increaser (Soda Ash) 10kg is the bulk pail choice for NZ pool and spa owners who want stable, balanced water all season without constant reordering. Fast-acting Sodium Carbonate raises pH quickly, keeps your chlorine effective, and protects your equipment and surfaces from acidic water damage.\u003c\/p\u003e\n\u003cp\u003eWhen pH drops below 7.2, chlorine loses up to 50% of its effectiveness and water becomes corrosive to pool surfaces, fittings, and equipment. A correct pH of 7.2-7.6 for pools and 7.2-7.8 for spas is essential for comfortable, efficient swimming.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Carbonate (Soda Ash)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e10kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e500g per 50,000L raises pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1 teaspoon (approx. 7g) per 1,000L raises pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Carbonate Formula.\u003c\/strong\u003e Fast-dissolving Soda Ash raises pH reliably without overcorrecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e pH begins rising within 30-60 minutes of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects pool shell, fittings, and equipment from acidic water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest Value 10kg Size.\u003c\/strong\u003e Lowest cost per kg in the range, ideal for large pools or frequent use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of pump circulation, then retest\u003c\/li\u003e\n\u003cli\u003eApply near a return jet for best distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1 teaspoon (approx. 7g) per 1,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003eDose gradually, retest after 30 minutes before adding more\u003c\/li\u003e\n\u003cli\u003eAlways run jets while dosing for even distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Never add more than the recommended dose in a single application, it is easier to add more than to correct an overshoot. Do not add pH Increaser and chlorine at the same time, adjust pH first, wait 6 hours, then add chlorine.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-increaser-1kg-soda-ash-spa-pool\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kg Pail (this product)\u003c\/strong\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - always test pH before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - complete water care bundle for new spa owners.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins rising within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much?\u003c\/strong\u003e\u003cbr\u003eA: High pH (above 7.8) causes cloudy water and reduces chlorine effectiveness. Use a pH Decreaser (Sodium Bisulphate) to bring it back down. Always dose gradually.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 10kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 50,000L pool needing a 0.5 raise in pH, you need 500g per dose. A 10kg pail provides approximately 20 full pool doses, enough for a full season of regular adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does my pH keep dropping?\u003c\/strong\u003e\u003cbr\u003eA: Common causes include Trichlor tablets (which are acidic), low Total Alkalinity, and heavy rainfall. Check your Total Alkalinity first, if it is below 80 ppm, raising it will help stabilise pH naturally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40121056821401,"sku":"CHEM-PH-UP-SODAASH-10KG","price":64.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/10kg_pH_Increase_Soda_Ash.png?v=1777001079"},{"product_id":"ph-decrease-10kg","title":"pH Decreaser Sodium Bisulphate 10kg | Pool \u0026 Spa pH Down","description":"\u003cp\u003eMaintain safe and balanced water chemistry in your swimming pool or spa pool with \u003cstrong\u003epH Decreaser (Sodium Bisulphate)\u003c\/strong\u003e. When pH rises above 7.6, chlorine loses up to 90% of its effectiveness, water turns cloudy, and scale builds on surfaces and fittings. A quick dose of Sodium Bisulphate brings it right back into range.\u003c\/p\u003e\n\u003cp\u003eThe 10kg pail is the best value option for large pools or frequent use, providing approximately 20 full pool doses for a 50,000L pool.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bisulphate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e10kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e500g per 50,000L lowers pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e10g per 1,000L lowers pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types including saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bisulphate Formula.\u003c\/strong\u003e Fast-acting granular pH reducer, the industry standard for lowering pool and spa pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e Lowers pH within hours of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Scale Buildup.\u003c\/strong\u003e Stops calcium deposits forming on pool surfaces, fittings, and equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest Value 10kg Size.\u003c\/strong\u003e Lowest cost per kg in the range, ideal for large pools or frequent use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003ePour near the skimmer or return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003cli\u003eNever add more than 500g per 50,000L in a single dose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e10g per 1,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a small bucket of water before adding\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Dose gradually, it is easier to add more than to correct an overshoot. Do not add pH Decreaser and chlorine at the same time, adjust pH first, wait 6 hours, then add chlorine. Sodium Bisulphate is corrosive, wear gloves when handling.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-ph-decrease-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-decrease-4kg\"\u003e\u003cstrong\u003e4kg Pail\u003c\/strong\u003e\u003c\/a\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10kg Pail (this product)\u003c\/strong\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - always test pH before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - use when pH drops too low and needs raising back to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Decreaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins dropping within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Decreaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much and pH drops too low?\u003c\/strong\u003e\u003cbr\u003eA: Use \u003ca href=\"\/products\/4kg-ph-increaser\"\u003epH Increaser (Soda Ash)\u003c\/a\u003e to bring it back up. Always dose gradually and retest before adding more to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long will a 10kg pail last?\u003c\/strong\u003e\u003cbr\u003eA: For a 50,000L pool needing a 0.5 reduction in pH, you need 500g per dose. A 10kg pail provides approximately 20 full pool doses, enough for a full season of regular adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is my pH always rising?\u003c\/strong\u003e\u003cbr\u003eA: Common causes include saltwater chlorinators, high Total Alkalinity, and aeration from jets or waterfalls. Check your Total Alkalinity first, if it is above 120 ppm, lowering it will help stabilise pH naturally.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Sodium Bisulphate safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types when used as directed.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40121058197657,"sku":"CHEM-PH-DOWN-BISULPH-10KG","price":66.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/Perfect_Pools_pH_Decrease_10kg_Bucket.png?v=1776847747"},{"product_id":"ph-decrease-4kg","title":"pH Decreaser Sodium Bisulphate 4kg | Pool \u0026 Spa pH Down","description":"\u003cp\u003e\u003cstrong\u003epH creeping too high?\u003c\/strong\u003e pH Decreaser (Sodium Bisulphate) is the fast, reliable way to bring pH back into the ideal range in swimming pools and spa pools, protecting your swimmers from irritation, keeping your chlorine effective, and preventing scale buildup on equipment.\u003c\/p\u003e\n\u003cp\u003eWhen pH rises above 7.6, chlorine loses up to 90% of its effectiveness, water turns cloudy, and scale builds on surfaces and fittings. A quick dose of Sodium Bisulphate brings it right back into range.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bisulphate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e4kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e500g per 50,000L lowers pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e10g per 1,000L lowers pH by approx. 0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types including saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bisulphate Formula.\u003c\/strong\u003e Fast-acting granular pH reducer, the industry standard for lowering pool and spa pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e Lowers pH within hours of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Scale Buildup.\u003c\/strong\u003e Stops calcium deposits forming on pool surfaces, fittings, and equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosts Chlorine Efficiency.\u003c\/strong\u003e Chlorine works best at correct pH levels, maximising sanitiser value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003ePour near the skimmer or return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003cli\u003eNever add more than 500g per 50,000L in a single dose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e10g per 1,000L\u003c\/strong\u003e to lower pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a small bucket of water before adding\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Dose gradually, it is easier to add more than to correct an overshoot. Do not add pH Decreaser and chlorine at the same time, adjust pH first, wait 6 hours, then add chlorine. Sodium Bisulphate is corrosive, wear gloves when handling.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-ph-decrease-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kg Pail (this product)\u003c\/strong\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-decrease-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - always test pH before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - use when pH drops too low and needs raising back to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Decreaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins dropping within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Decreaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much and pH drops too low?\u003c\/strong\u003e\u003cbr\u003eA: Use \u003ca href=\"\/products\/4kg-ph-increaser\"\u003epH Increaser (Soda Ash)\u003c\/a\u003e to bring it back up. Always dose gradually and retest before adding more to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often will I need to adjust pH?\u003c\/strong\u003e\u003cbr\u003eA: Test weekly during summer and after heavy rain or high bather load. Spas should be tested after every use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Sodium Bisulphate safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types when used as directed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is my pH always rising?\u003c\/strong\u003e\u003cbr\u003eA: Common causes include saltwater chlorinators, high Total Alkalinity, and aeration from jets or waterfalls. Check your Total Alkalinity first, if it is above 120 ppm, lowering it will help stabilise pH naturally.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40121200738457,"sku":"CHEM-PH-DOWN-BISULPH-4KG","price":38.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/Perfect_Pools_pH_Decreaser_Sodium_Bisulphate_4kg_white_pail_with_green_label_-_pool_and_spa_pH_down_NZ.png?v=1774422410"},{"product_id":"calcium-hardness-increaser-4kg","title":"Calcium Hardness Increaser 4kg | Calcium Chloride Pool \u0026 Spa","description":"\u003cp\u003e\u003cstrong\u003eSoft water silently destroying your spa or pool?\u003c\/strong\u003e Calcium Hardness Increaser (Calcium Chloride) is the essential treatment that protects your pool shell, heater, pump, and fittings from the corrosive effects of low-calcium water - while eliminating foaming and etching that soft water causes.\u003c\/p\u003e\n\u003cp\u003eWater with low calcium hardness is aggressive - it actively seeks calcium by leaching it from your pool surfaces, grout, and equipment. The result is pitting, etching, foaming, and expensive equipment damage. A correct calcium hardness level of 200-400 ppm for pools and 150-250 ppm for spas is your first line of defence.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eCalcium Chloride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e4kg resealable pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSwimming pools, spa pools, plunge pools, and hot tubs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePool Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e300g per 20,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSpa Dosage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e15g per 1,000L raises calcium hardness by approx. 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e200-400 ppm (varies by surface type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e150-250 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy Calcium Hardness Matters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eToo low - water becomes corrosive, etches surfaces, causes foaming, damages heaters and pumps\u003c\/li\u003e\n\u003cli\u003eToo high - water turns cloudy, scale deposits form on surfaces and fittings\u003c\/li\u003e\n\u003cli\u003eCorrect calcium hardness = protected equipment, clear water, and longer pool life\u003c\/li\u003e\n\u003cli\u003eIdeal range for pools: 200-400 ppm | Ideal range for spas: 150-250 ppm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Ingredient: Calcium Chloride.\u003c\/strong\u003e The industry standard for raising calcium hardness quickly and evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Raises calcium hardness quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools, spa pools, plunge pools, and hot tubs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects pool shell, heater elements, pumps, and fittings from soft water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces Foaming.\u003c\/strong\u003e Eliminates foaming caused by soft, low-calcium water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kg Resealable Pail.\u003c\/strong\u003e Moisture-resistant storage for long shelf life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools (per 1,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e15g per 1,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003eExample: 150g raises calcium by 100 ppm in a 1,000L spa\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding - solution will heat up, this is normal\u003c\/li\u003e\n\u003cli\u003eRun jets while dosing for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools (per 20,000L):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e300g per 20,000L\u003c\/strong\u003e to raise calcium hardness by 10 ppm\u003c\/li\u003e\n\u003cli\u003eExample: 1.5kg raises calcium by 50 ppm in a 20,000L pool\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to pool\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color: #fff8e1; border-left: 4px solid #ffa000; padding: 15px; margin: 20px 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always pre-dissolve Calcium Chloride in a bucket of water before adding - never add directly as it can cause localised cloudiness. The solution will get warm - this is a normal exothermic reaction. Always add chemical to water, not water to chemical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kg Pail (this product)\u003c\/strong\u003e - most popular for regular pool and spa maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/calcium-hardness-increaser-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety and Storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStore in a cool, dry place away from direct sunlight and moisture\u003c\/li\u003e\n\u003cli\u003eKeep away from children and pets\u003c\/li\u003e\n\u003cli\u003eDo not mix with other pool chemicals\u003c\/li\u003e\n\u003cli\u003ePre-dissolving causes heat - use a plastic bucket and handle with care\u003c\/li\u003e\n\u003cli\u003eAvoid inhaling dust - use in a well-ventilated area\u003c\/li\u003e\n\u003cli\u003eWash hands thoroughly after handling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test calcium hardness, pH, chlorine, and alkalinity before and after dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity alongside calcium for fully balanced water.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - adjust pH to the ideal 7.2-7.6 range after balancing calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct chemistry for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Calcium Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does my spa foam so much?\u003c\/strong\u003e\u003cbr\u003eA: Foaming is one of the most common signs of low calcium hardness. Raise calcium to 150-250 ppm and the foaming will reduce significantly. Also check for body oils and detergent residue from swimwear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Calcium Hardness Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: Calcium dissolves and disperses within a few hours. Allow 6 hours of full circulation before retesting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does the solution get hot when I pre-dissolve it?\u003c\/strong\u003e\u003cbr\u003eA: Calcium Chloride is exothermic - it releases heat when dissolved in water. This is completely normal. Always use a plastic bucket and add the chemical to water, not water to the chemical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add too much calcium?\u003c\/strong\u003e\u003cbr\u003eA: Yes - calcium above 400 ppm causes cloudy water and scale deposits on surfaces and equipment. Dose gradually and retest before adding more. High calcium can only be corrected by diluting with fresh water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often will I need to adjust calcium hardness?\u003c\/strong\u003e\u003cbr\u003eA: Calcium hardness is stable and doesn't deplete quickly. Test monthly and after significant water top-ups or refills. Spas need more frequent testing due to evaporation concentrating the water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes - safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types when used as directed.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003eNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003eQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40121234423961,"sku":"CHEM-CAL-INC-4KG","price":32.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/4kg_Calcium_Increase_Perfect_Pools.png?v=1774422809"},{"product_id":"4kg-alkalinity-increaser","title":"Alkalinity Increaser Sodium Bicarbonate 4kg | Pool \u0026 Spa","description":"\u003cp\u003e\u003cstrong\u003epH swings driving you crazy?\u003c\/strong\u003e Alkalinity Increaser (Sodium Bicarbonate) is the essential buffer that keeps your pool or spa water stable, stopping pH from bouncing up and down every time you add chemicals, it rains, or bather load changes.\u003c\/p\u003e\n\u003cp\u003eWithout adequate Total Alkalinity, pH becomes impossible to control. Chlorine loses effectiveness, water turns corrosive, and your equipment pays the price. A correct Total Alkalinity level of 80-120 ppm is the foundation of balanced water chemistry.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Bicarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e4kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-120 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget Range (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e80-125 ppm Total Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Bicarbonate Formula.\u003c\/strong\u003e The gold standard for raising Total Alkalinity without significantly affecting pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH-Neutral Action.\u003c\/strong\u003e Raises Total Alkalinity while keeping pH movement minimal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Dissolving.\u003c\/strong\u003e Disperses quickly for even distribution throughout the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects Equipment.\u003c\/strong\u003e Prevents corrosion of pumps, heaters, and fittings caused by low Total Alkalinity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1.5kg per 50,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAdd near a return jet with the pump running\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of circulation, then retest before adding more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e30g per 1,000L\u003c\/strong\u003e to raise Total Alkalinity by approximately 10 ppm\u003c\/li\u003e\n\u003cli\u003eRun jets while adding for even distribution\u003c\/li\u003e\n\u003cli\u003eRetest after 30 minutes before re-dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always adjust Total Alkalinity before adjusting pH. Getting Total Alkalinity right first makes pH much easier to control. Test with strips before and after every dose.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/alkalinity-increaser-1kg\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kg Pail (this product)\u003c\/strong\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/alkalinity-increaser-pool-spa-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-ph-increaser\"\u003e\u003cstrong\u003epH Increaser (Soda Ash) 4kg\u003c\/strong\u003e\u003c\/a\u003e - once Total Alkalinity is correct, use to fine-tune pH up to 7.2-7.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct Total Alkalinity and pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test Total Alkalinity, pH, and chlorine before and after every dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes Alkalinity Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between alkalinity and pH?\u003c\/strong\u003e\u003cbr\u003eA: Total Alkalinity is the buffer that keeps pH stable. Think of Total Alkalinity as the anchor, without it pH drifts constantly. Always correct Total Alkalinity first, then adjust pH.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does Alkalinity Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: It begins working within minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add Alkalinity Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, adjust alkalinity first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if my Total Alkalinity is too high?\u003c\/strong\u003e\u003cbr\u003eA: High Total Alkalinity (above 150 ppm) is corrected by adding a pH Decreaser (Sodium Bisulphate) and aerating the water. Test regularly to avoid overcorrecting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often will I need to adjust alkalinity?\u003c\/strong\u003e\u003cbr\u003eA: Test weekly during summer and after heavy rain or high bather load. Spas should be tested after every use or at least weekly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40121241403545,"sku":"CHEM-ALK-BICARB-4KG","price":30.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/Perfect_Pools_4kg_Alkalinity_Increase.png?v=1774422142"},{"product_id":"4kg-ph-increaser","title":"pH Increaser Soda Ash 4kg | Pool \u0026 Spa pH Up","description":"\u003cp\u003e\u003cstrong\u003eLow pH making your pool uncomfortable?\u003c\/strong\u003e pH Increaser (Soda Ash) is the fast, reliable way to raise pH in swimming pools and spa pools, protecting your swimmers, your equipment, and making sure your chlorine actually works.\u003c\/p\u003e\n\u003cp\u003eWhen pH drops below 7.2, chlorine loses up to 50% of its effectiveness, water becomes corrosive to fittings and surfaces, and swimmers experience stinging eyes and irritated skin. A quick dose of Soda Ash fixes all of that.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSodium Carbonate (Soda Ash)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e4kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Pools)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTarget pH (Spas)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e7.2 - 7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eAll pool and spa types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eResealable moisture-resistant pail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium Carbonate Formula.\u003c\/strong\u003e Fast-dissolving Soda Ash raises pH reliably without overcorrecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-Acting.\u003c\/strong\u003e pH begins rising within 30-60 minutes of application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose.\u003c\/strong\u003e Suitable for swimming pools and spa pools of all types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Corrosion.\u003c\/strong\u003e Protects pool shell, fittings, and equipment from acidic water damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosts Chlorine Efficiency.\u003c\/strong\u003e Chlorine works best at correct pH levels, maximising sanitiser value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosing Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpa Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e1 teaspoon (7g) per 1,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003eDose gradually, retest after 30 minutes before adding more\u003c\/li\u003e\n\u003cli\u003eAlways run jets while dosing for even distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSwimming Pools:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdd \u003cstrong\u003e500g per 50,000L\u003c\/strong\u003e to raise pH by approximately 0.5\u003c\/li\u003e\n\u003cli\u003ePre-dissolve in a bucket of water before adding to the pool\u003c\/li\u003e\n\u003cli\u003eAllow 6 hours of pump circulation, then retest\u003c\/li\u003e\n\u003cli\u003eApply near a return jet for best distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #ffa000;padding:15px;margin:20px 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Always test pH before and after dosing. Target 7.2-7.6 for pools, 7.2-7.8 for spas. Never add more than the recommended dose in a single application.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/ph-increaser-1kg-soda-ash-spa-pool\"\u003e\u003cstrong\u003e1kg Pail\u003c\/strong\u003e\u003c\/a\u003e - ideal for spas or small top-up doses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kg Pail (this product)\u003c\/strong\u003e - most popular for regular pool maintenance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/pool-spa-ph-increaser-soda-ash-10kg\"\u003e\u003cstrong\u003e10kg Pail\u003c\/strong\u003e\u003c\/a\u003e - best value for large pools or frequent use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRecommended Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/crystalline-chlorine-4kg-pool-spa-sanitizer\"\u003e\u003cstrong\u003eCrystalline Chlorine 4kg\u003c\/strong\u003e\u003c\/a\u003e - sanitise at the correct pH for maximum effectiveness.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/4kg-alkalinity-increaser\"\u003e\u003cstrong\u003eAlkalinity Increaser 4kg\u003c\/strong\u003e\u003c\/a\u003e - stabilise Total Alkalinity first to make pH easier to control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/5-in-1-pool-spa-test-strips-25-pack\"\u003e\u003cstrong\u003e5-in-1 Test Strips\u003c\/strong\u003e\u003c\/a\u003e - test pH, chlorine, and alkalinity before and after every dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spa-pool-starter-kit-complete-water-care-chlorine-treatment\"\u003e\u003cstrong\u003eSpa Pool Starter Kit\u003c\/strong\u003e\u003c\/a\u003e - includes pH Increaser plus everything needed for a fresh fill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How quickly does pH Increaser work?\u003c\/strong\u003e\u003cbr\u003eA: pH begins rising within 30-60 minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I add pH Increaser and chlorine at the same time?\u003c\/strong\u003e\u003cbr\u003eA: No, always adjust pH first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What if I add too much?\u003c\/strong\u003e\u003cbr\u003eA: High pH (above 7.8) causes cloudy water and reduces chlorine effectiveness. Use a pH Decreaser (Sodium Bisulphate) to bring it back down.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often will I need to adjust pH?\u003c\/strong\u003e\u003cbr\u003eA: Test weekly during summer and after heavy rain or high bather load. Spas should be tested after every use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this safe for all pool types?\u003c\/strong\u003e\u003cbr\u003eA: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.\u003c\/p\u003e\n\u003ch3\u003ePickup and Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/maps.google.com\/?q=15C+Douglas+Alexander+Parade+Albany+Auckland\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003ePerfect Pools Service Warehouse\u003c\/strong\u003e - 15C Douglas Alexander Parade, Albany, Auckland\u003c\/a\u003e\u003cbr\u003e\n\u003cstrong\u003eHours:\u003c\/strong\u003e Mon-Fri 9am-4pm | Sat 10am-2pm\u003cbr\u003e\nNZ-wide delivery available. Charges calculated at checkout.\u003cbr\u003e\nQuestions? Email \u003ca href=\"mailto:perfectpoolsnz@gmail.com\"\u003eperfectpoolsnz@gmail.com\u003c\/a\u003e or visit our \u003ca href=\"\/pages\/contact\"\u003econtact page\u003c\/a\u003e.\n\u003c\/p\u003e","brand":"Perfect Pools NZ","offers":[{"title":"Default Title","offer_id":40919255646361,"sku":"CHEM-PH-UP-SODAASH-4KG","price":37.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0443\/7514\/6649\/files\/pH_Increase_4kg_Hero.png?v=1774421216"}],"url":"https:\/\/perfectpools.co.nz\/collections\/pool-water-balancers.oembed","provider":"Perfect Pools NZ","version":"1.0","type":"link"}