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  1. D

    High CYA, High TA, Reasonable FC & confused.

    OK. Some cousins moved to our neck of the woods. We agreed to help them with their pool, which was filled with algae. Initially we added pure (unbuffered/unconditioned) shock. They got some other shock which obviously had CYA in it. Here's where things are: CYA 100 FC 7 TC 18 TA off the...