Quote Originally Posted by BigDave View Post
Sounds like that means CYA = 180. No?


2lbs calcium hypochlorite would add a little less than 7ppm FC to 20,000gallons- not nearly enough to shock at 90ppm CYA much less 180ppm CYA.
BigDave, I think you are right: jsaldi meant calcium hypochlorite, when he said sodium hypochlorite. Aka, Cal-Hypo.