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I think there's a lot of misleading info about chlorine concentrations, particularly about sodium hypochlorite--i.e. bleach, or shock. Please correct me if I'm wrong. Clorox bleach is about 8.5% and pool shock is 12.5%, but that's hypochlorite, and chlorine is only 47% of sodium hypochlorite by...

What an excellent site! It's been obvious to me for a while that my CYA is way too high, through using dichlor for ages. Only through reading this site did I find that out. I just ordered a kit with a CYA test, but already I'm sure: adding yet more dichlor or even hypo barely registers chlorine...