pH is the most important factor controlling your pool water balance. It refers to the measure of the relative acid or base of the pool water and should be tested daily.
If pH is too high
pH values above 7.8 will lead to cloudy water, staining, scale deposits, filtration problems and reduces chlorine efficiency.
If pH Is too low
pH values below 7.2 may lead to corrosion of metallic pipes, etched plaster, rapid loss of chlorine residual and possible irritation to swimmers.
To maintain an ideal pH level in your pool water, use GLB pH Up when the pH drops below 7 .2. When the pH level rises above 7.8, use GLB pH Down.