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Water that contains no dissolved material will be very aggressive and there will be a natural attempt by the water to balance. This will mean that the aggressive (or acidic) water will try to dissolve any materials that it is in contact with, such as the surface cement, tile grout or pumps in order to balance itself.

Conversely, water that contains excessive dissolved material will try to re-balance itself by depositing (or precipitating) calcium and metals onto the surface of the pool or pipes. The result is a rough pool surface, calcium spots, clogged pipework, heater or tiles.

Maintaining the correct dissolved mineral levels in your water (or pH) will mean that the water is no longer seeking minerals It also means that the water is not overloaded with minerals and ‘solids’ that will soon be deposited on the surface of the pool.

This ‘sweet spot’ is often referred to as balanced water. Both pH extremes are destructive and should be avoided. Maintaining the correct pH level (7.4) in your swimming pool is one of the most important components of water chemistry.

Poor pH balance has led to nearly every type of stain that our technical team see each day. Our gallery photographs show some extreme cases where the pH has been left to drift a long way above the suggested 7.4. This shift causes the mineral, metals, copper, calcium or manganese to bond to the surface of the pool interior leaving an unsightly stain that will not brush away.

Thankfully these issues are able to be rectified through our treatment process. However we often say to our customers that if everyone who owned a pool kept their water perfectly balanced we would be out of business! It is very difficult for stains to occur and remain when the water is properly balanced.