
10kg Calcium Hardness Increaser – For Large Spas & Swimming Pools
Keep your pool or spa balanced and protected with our 10kg Calcium Hardness Increaser, perfect for ongoing water care or larger pool systems. This high-value size is ideal for regular top-ups in residential pools, commercial spas, or water-heavy plunge pools.
💧 Why It Matters:
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Reduces scaling and corrosion in pool heating systems
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Protects fibreglass and concrete surfaces from etching
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Minimises foaming and keeps water stable
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Supports overall chemical efficiency and water clarity
📏 Dosage Guide:
For Spas (1,000L): 15g = +10 ppm
For Pools (20,000L): 300g = +10 ppm
Example:
To increase calcium by 50 ppm in a 20,000L pool, add 1.5kg
📦 Product Details:
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Size: 10kg resealable bucket
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Active Ingredient: Calcium Chloride
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Suitable for spas, swim spas, large plunge pools and residential swimming pools
🛒 Available Now from Perfect Pools NZ
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Collect from our Albany warehouse
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NZ-wide shipping or Auckland valet service by appointment
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Need a water test? Email perfectpoolsnz@gmail.com and we’ll help