pH indicates how acidic or basic the water is. pH should be tested daily. Once you gain
experience with your pool, less frequent monitoring may be appropriate depending on your pool's typical
rate of pH change. pH levels between 7.2 and 7.8 are suitable for swimming, while levels between 7.0
and 7.6 are ideal. pH below 7.2 tends to make eyes sting or burn, pH below 7 .0 can cause damage
to metal parts, particularly pool heaters with copper heat exchange coils. High pH can lead to calcium
scaling. Pools with CHLORINE GENERATORS may witness an increase in pH due to the production of chlorine high in sodium. Use Chemex pH Increaser to raise your pH level if your test is low, and Chemex pH Decreaser to low a high pH reading.
See Total Alkalinity