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My water finds multiple choice too hard. So I soften it up with a True/False test and occasionally shock it with a pop quiz Strips and HTM from WalMart
Old fashioned way.Double tube test for clorine and PH.SemperFi Dick
Unless I'm mistaken, this method gives a total chlorine result rather than free chlorine (as in the kind that can do the killin') Please correct me if I'm wrong!