Drawing 10148 REV 0 24-11-15
Trouble Shooting
Poor Water Balance can be caused by the wrong choice of chemicals. In soft water areas shown in
the below map the ideal choice of chemicals would be calcium hypochlorite to increase the calcium
hardness and CO2 which lowers pH and increases alkalinity. In hard water areas the ideal choice of
chemicals would be sodium hypochlorite and sodium bisulphate, providing the pool volume does
not exceed 400m3. In this case the sodium bisulphate should be replaced by hydrochloric acid, so
that sulphate levels do not reach maximum guidelines. In all other areas of the country the chemical
choice should be carefully considered and a combination of the above chemicals may be needed.
For practical or safety reasons, it is possible to use combinations of chemicals that do not suit the
incoming water supply, however water balance must then be maintained by the addition of
chemicals or the wastage of water. Poor water balance will damage the pool structure and can
lead to poor chemical control.
Map Showing Incoming Water Coming
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