Quote Originally Posted by aylad View Post
With a CYA of 60, shock level is 20 ppm, and you need to sustain that as consistently as possible until you can go overnight without losing more than 1 ppm of chlorine. I don't know how much total that will be, but
Boy, that was helpful, huh Internet went out in the middle of editing that post. Thanks, Watermom, for finishing it for me!