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    Proper TC to FC ratio and CYA numbers

    Getting ready to close my pool. Just tested by pool installer. TC is 10.0 (I think their test system will not register above 10.0 but I think TC is above 10), FC is 10.0 (but again I think limited by test system), pH is a 7.7, TA is 165, CH is 300, CYA is 135. Reading the TFP Pool School...