Alkalinity Increaser Sodium Bicarbonate 10kg | Pool & Spa

The best value Total Alkalinity treatment for serious pool owners. 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.

Without 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.

Product Specifications

Key Features

• Sodium Bicarbonate Formula. The gold standard for raising Total Alkalinity without significantly affecting pH.
• pH-Neutral Action. Raises Total Alkalinity while keeping pH movement minimal.
• Fast-Dissolving. Disperses quickly for even distribution throughout the water.
• Dual-Purpose. Suitable for swimming pools and spa pools of all types.
• Protects Equipment. Prevents corrosion of pumps, heaters, and fittings caused by low Total Alkalinity.
• Best Value 10kg Size. Lowest cost per kg in the range, ideal for large pools or frequent use.

Dosing Guide

Swimming Pools:

• Add 1.5kg per 50,000L to raise Total Alkalinity by approximately 10 ppm
• Pre-dissolve in a bucket of water before adding to the pool
• Add near a return jet with pump running
• Allow 6 hours of circulation, then retest before adding more

Spa Pools:

• Add 30g per 1,000L to raise Total Alkalinity by approximately 10 ppm
• Run jets while adding for even distribution
• Retest after 30 minutes before re-dosing

Available Sizes

• 1kg Pail - ideal for spas or small top-up doses.
• 4kg Pail - most popular for regular pool maintenance.
• 10kg Pail (this product) - best value for large pools, frequent use, or stocking up for the season.

Recommended Accessories

• 5-in-1 Test Strips - test Total Alkalinity, pH, chlorine, and hardness before and after every dose.
• pH Increaser (Soda Ash) 4kg - once Total Alkalinity is correct, use to fine-tune pH up to 7.2-7.6.
• Crystalline Chlorine 4kg - sanitise at the correct Total Alkalinity and pH for maximum effectiveness.
• Spa Pool Starter Kit - includes Alkalinity Increaser plus everything needed for a fresh fill.

Frequently Asked Questions

Q: What is the difference between alkalinity and pH?
A: 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.

Q: How quickly does Alkalinity Increaser work?
A: It begins working within minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.

Q: Can I add Alkalinity Increaser and chlorine at the same time?
A: No, adjust alkalinity first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.

Q: What if my Total Alkalinity is too high?
A: High Total Alkalinity (above 150 ppm) is corrected by adding a pH Decreaser (Sodium Bisulphate) and aerating the water. Test regularly to avoid overcorrecting.

Q: How long will a 10kg pail last?
A: 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.

Q: Is this safe for all pool and spa types?
A: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types.

Pickup and Delivery

Perfect Pools Service Warehouse - 15C Douglas Alexander Parade, Albany, Auckland
Hours: Mon-Fri 9am-4pm | Sat 10am-2pm
NZ-wide delivery available. Charges calculated at checkout.
Questions? Email perfectpoolsnz@gmail.com or visit our contact page.