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:

• Reduces scaling and corrosion in pool heating systems

• Protects fibreglass and concrete surfaces from etching

• Minimises foaming and keeps water stable

• 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:

• Size: 10kg resealable bucket

• Active Ingredient: Calcium Chloride

• Suitable for spas, swim spas, large plunge pools and residential swimming pools

🛒 Available Now from Perfect Pools NZ

• Collect from our Albany warehouse

• NZ-wide shipping or Auckland valet service by appointment

• Need a water test? Email perfectpoolsnz@gmail.com and we’ll help