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 hing

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 📦 :

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

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