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  1. C

    Black Algae and High CYA

    New member to the board . . . .any input/advise welcome. FC 1.0, CC 0, pH 7.8, Ca H 250, TA 80, CYA 120 I have black algae starting on the steps and benches - first time for me. I have scrubbed the algae using a stainless steel brush and I just flushed the cartridges. I normally use the...