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Second, a swimmerâs body has a pH between 7.2 and 7.8, so if the. pool water isnât kept in this range then swimmers will start to feel irritation of their. eyes and skin. Keeping the pH in this range will balance chlorineâs germ-killing.
This kind of pool chlorine is good when you shock it and nothing will happen to the CYA level. Remember that Calcium Hypochlorite will raise your calcium hardness and increase the pH level. Remember: 1  Use your pool pucks on a regular basis. 2  These can be used in your salt water pool systems as well.