PH AND ALKALINITY

PH
Acidity and alkalinity are measured by the pH concentration. This is a logarithmic system with values below 7.0 for acidity, above 7.0 for alkalinity, 7.0 being neutral (Neither acid nor alkaline). Acid water fosters the corrosion of metal parts, which can lead to the expense of replacing heaters, filters and other equipments.
Alkali water causes mineral deposits, which interferes with disinfectant. Cloudy water irritates bathers’ skins, eyes and breathing passages. The typical pH level of pool water must not have pH concentration either too high or too low of 7.2-7.8

a.When pH in pool water is below pH 7.2 use Sodium Carbonate (Na2Co3 or commonly
known as soda ash) to raise the pH level
b.When pH in pool water is above pH 7.8 use Hydrochloric Acid (HCL or NaHSo4) to
lower the pH level.

ALKALINITY
This refers to the quantity of alkaline materials in the water, which should be from 80 to 200 ppm. To
prevent the rapid change of pH concentration (ph-bounce)