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    Lowering CYA & TA with Pool Drain

    Howdy All, I have been a TFP member for a week and just received my TF-Pro Salt test kit this weekend. Test results from earlier today FC 4.5 CC 0 pH 7.5 CH 275 TA 120 CYA 100 Temp 67 F I understand to lower my CYA from 100 down to 60 that I will need to drain 40 % of the pool. If I can...