Quote Originally Posted by Pool8 View Post
What all does the CYA do? My pool seems to be holding chlorine at the 3-5 range consistently without dissipating. I was under the impression that the only purpose for CYA was to help you maintain chlorine, which I am doing. Is that right?
Bottom line: higher CYA will make your SWCG work less hard, and last longer. The Best Guess page has not been rewritten to reflect either the SWCG norms, or the HiC2 (high chlorine + high CYA) option. It's on the to-do list.