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Water Chemistry

The chemistry of the water in your Pool/Spa Hot Tub is all to do with the balance of chemicals naturally found in water with the addition of a Sanitiser. For your Sanitiser to work, other water attributes must be balanced: pH, Alkalinity and Calcium Hardness, to name a few. Maintaining the right balance can be a daunting prospect but we are here to help.

Below are the optimum parameters for chemicals;

Chlorine (Swimming Pool)
2 – 4 ppm
Chlorine (Spa/Hot Tub)
2 – 4 ppm
2 – 4 ppm
3500 – 4000 ppm
7.2 – 7.8
T.A (Total Alkalinity)
80 – 120 ppm
Calcium Hardness
200 – 400 ppm
Cyanuric Acid
40 – 100 ppm
Copper and Iron
Near zero


For more information on each individual chemical, take a look through our other Know How pages.