Description
Protect your spa, above ground, or inground pool from corrosion, foaming, and surface damage with Calcium Hardness Increaser. This fast-dissolving, fully soluble formula safely raises calcium hardness levels, helping prevent etching, scaling, and wear on heaters, pumps, liners, and pool finishes. Safe to swim immediately after application, its ideal for seasonal water maintenance and long-term protection.
Available in 8kg and 20kg containers, this increaser is perfect for all pool and spa sizes, from small hot tubs to large inground pools.
Key Benefits
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Raises calcium hardness quickly and safely
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Completely soluble, fast-acting formula
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Prevents foaming, etching, and corrosion
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Protects heaters, pumps, plumbing, and pool surfaces
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Safe for vinyl, fiberglass, acrylic, plaster, and concrete
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Swim immediately after application
How Many Containers You Need per Season
| Pool Type | Approx. Volume (Litres) | Total Calcium Needed (per season) | 4kg Container(s) Needed | 20kg Container(s) Needed |
|---|---|---|---|---|
| Hot Tub / Spa | 1,5004,000 L | 75100 g per adjustment, 46 adjustments | 1 | |
| 810 ft Round Above Ground | 5,0008,000 L | 500600 g | 1 | |
| 12 ft Round Above Ground | 10,00012,000 L | 11.5 kg | 1 | |
| 15 ft Round Above Ground | 15,00018,000 L | 22.5 kg | 1 | |
| 12×18 ft Oval Above Ground | 13,00016,000 L | 1.52 kg | 1 | |
| 15×24 ft Oval Above Ground | 20,00025,000 L | 2.53 kg | 1 | |
| Small Inground Pool | 30,00040,000 L | 45 kg | 1 | |
| Medium Inground Pool | 50,00060,000 L | 67 kg | 2 | |
| Large Inground Pool | 70,00080,000 L | 810 kg | 3 | 1 |
Note: Table assumes seasonal maintenance with 46 treatments. Actual dosage may vary depending on starting calcium levels.
Directions for Use
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Test Water: Determine current calcium hardness.
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Calculate Dose: Use approximately 25 g per 1,000 litres per adjustment.
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Apply: Broadcast evenly across pool or spa water while the pump is running.
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Circulate & Retest: Allow full circulation and retest before the next adjustment.
Protect your investment: Regular calcium maintenance prevents corrosion, scaling, and foaming, keeping your spa or pool safe, clean, and enjoyable all season.
