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  1. Mcmitzi

    Keeping FC at 20% of CYA: Yes or No?

    First and foremost thank you to every contributor on this site. I’ve mined the old threads here and my pool is transformed! A piece of advice I see sometimes is “keep the chlorine at 20% of CYA” and I want to be sure that I am 1. Calculating that correctly and 2. That my pool qualifies for this...