Water Hardener - Calcium Chloride

Pool Master Water Hardener is formulated to increase calcium hardness in swimming pools and spas, protecting metal parts, heaters, and pool surfaces from corrosion and etching. Ideal for use in soft water areas, this premium-grade product keeps your water balanced and extends the lifespan of pool equipment.

• Prevents corrosion of pumps, heaters, and fittings
• Helps avoid etching and staining of concrete and plaster surfaces
• Maintains correct calcium hardness for balanced, healthy water
• Easy to dose—simply follow directions for safe application
• Suitable for all pool and spa types
• Manufactured to strict NZ quality standards

Keep your pool or spa in optimal condition—trusted by Kiwi pool professionals. For best results, always follow label instructions and recommended calcium hardness levels.

We accept returns on all unopened chemical products within 14 days of delivery. For returns, exchanges, or product concerns, please contact our team with your order details.

Made to order and shipped NZ-wide
Most products are processed within 1–3 business days, and made-to-order items usually dispatch within 5–10 business days. Rural deliveries may take slightly longer.

Courier & Freight Services
All orders are shipped through Aramex New Zealand (Platinum Tier) or approved freight partners.
Delivery timeframes:

• North Island: Next working day target
• South Island: 2–3 working days target
• Rural Delivery (RD): Add 1–3 days

Shipping costs are automatically calculated at checkout based on your selected Aramex Zone (Z1–Z5).
Freight for oversize or heavy items (over 25 kg / 1.2 m) is confirmed by our logistics team before dispatch.

Dangerous Goods (DG)
Certain products (e.g. pool chemicals, acids, oxidisers, flammable products) are classified as Dangerous Goods and incur a $5.00 + GST handling surcharge per parcel, applied automatically at checkout.
DG items may require additional processing time or restricted service areas under Aramex NZ policy.

Freight Access Requirements
Please ensure safe, unobstructed access for delivery.
Delivery is to curbside or the nearest accessible point and does not include installation or site placement.

Tracking & Support
Tracking details will be emailed once your order has been dispatched.
For assistance or urgent delivery enquiries, contact info@aquatech.co.nz or call 09 636 9921.

For detailed rates and zone maps, see the Reference Documents section on our Shipping, Returns & Warranty Policy page.