I bought proteam brand polyquat 60. I read that I should let by fc level drop to half of shock level before adding polyquat 60 to close pool for winter because high chlorine can reduce/interfer with effectiveness of polyquat 60...however when I looked up proteam polyquat 60 online it says their product is "not affected by high chlorine residuals"...does this mean I don't have to let chlorine go to half shock level?
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