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  1. J

    Needing advice

    Hello! Well after years of just checking total chlorine and PH and lately being less than successful with it, I have found this community. Here is my situation: 30k gal inground vinyl, sand filter, 15 yr old with 4 yr old liner, sand changed 2 yr ago. FC 2 TC 2 CH 90 CYA 0 TA 70 PH 6.8 I have...