1kg Calcium Hardness Increaser – For Spa Pools & Hot Tubs

Keep your spa water crystal clear and balanced with our 1kg Calcium Hardness Increaser, specially formulated for use in spa pools, hot tubs, and plunge pools. Maintaining the correct calcium hardness level is essential to prevent corrosion, foaming, and damage to spa surfaces and equipment.

Made with high-quality Calcium Chloride, this product quickly raises the calcium levels in soft water, protecting your spa shell, heater, and internal fittings. 💧 Why You Need It:

Prevents corrosion of internal components

Reduces foaming and surface hing

Protects heaters, jets, and spa shells

Supports overall water balance and clarity 📏 Dosage Guide (Per 1,000 Litres):

To raise calcium hardness by 10 ppm, add 15g per 1,000L.

Example:
To raise from 100 ppm to 200 ppm in a 1,000L spa, add 150g of product.
Always dissolve in a bucket of warm water before adding to your spa with the pump running.

Ideal calcium hardness range for spas: 150–250 ppm 📦 :

Size: 1kg resealable pail

Active Ingredient: Calcium Chloride

Suitable for: All spa pools, hot tubs, and swim spas 🛍️ Available Now at Perfect Pools

Pickup from our Albany warehouse: 15C Douglas Alexander Parade

Open Monday–Friday 9am–4pm, Saturday 10am–2pm

Auckland delivery and valet service available

Email perfectpoolsnz@gmail.com to book an onsite service or get help with water balancing