To ensure the treatment products are more effective and provide bathers with optimum comfort, it is essential that you check with water balance regularly and clean your swimming pool. Keeping the water balanced is above all about adjusting the pH correctly.
The pH defines the acidic or basic (alkaline) character of the water. It can be anything between 0 and 14, with pure water having a pH of 7. The "ideal" pH for swimming pool water is between 7.0 and 7.4.

The pH must be checked before checking the chlorine level, several times a week.
This is because a poorly adjusted pH can make the chlorine ineffective and can cause skin and eye irritation and unpleasant smells.
You should therefore check your swimming pool water's pH regularly with the  hth Analysis tablet kit.
Usehth pH– to reduce the pH of your water or hth pH +to increase it. This product is easy to dose because a measurer is included in the bucket. Pour the contents directly in front of the return fittings.