For a vinyl liner pool, what would be the optimum PH to close a pool with to give the chlorine the most killing power possible but yet protect the liner from damage as it sits all winter long with elevated chlorine levels from the closing shock?
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For a vinyl liner pool, what would be the optimum PH to close a pool with to give the chlorine the most killing power possible but yet protect the liner from damage as it sits all winter long with elevated chlorine levels from the closing shock?