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50k inground, vinyl liner, new 300lb sand filter,years of tri and dichlor treatment.Just got my Taylor k-2006 FAS-DPD kit and stockpiled 10% bleach. CYA readings concern me. Is there hope beyond draining? pH 6.8 TA 95 Cya 180 FC 1 TC 1 CH 75 Should I balance pH and test again, or is that a...

Wondering if anyone may estimate the number of gallons of regular (8-9% sodium hypochlorite) bleach I should have on hand to SLAM A 45,000 gallon in ground? TC is 3, FC is .5.