Calcium Plus
Spa Chem
£38.62
Calcium Plus (Hardness Increaser) To increase calcium hardness in pool water. Incorrect levels of calcium hardness may lead to pool surface and circulation problems. Treatment A low calcium carbonate level, below 40mg/litre the water may be corrosive. At 80mg/litre calcium carbonate a scale can start to form giving a protective layer to internal components of the pool plant. A calcium hardness level between 80mg/litre and 200mg/ litre is recommended. To increase the calcium hardness by 20mg/litre add 1.5kg Hardness Plus per 50m3. Application Dissolve Hardness Plus in 10 litres of water in a pl
Spa Chem's own words, read from their page.
Buy from SPA CHEM LIMITEDSPA CHEM LIMITED is a UK retailer, not the maker. Out of stock. Price seen 2026-09-26. Not an affiliate link, we earn nothing from it.






