Quote Originally Posted by chem geek View Post
... So generally if you are going to add a lot of chlorine and PolyQuat, such as when you are going to close a pool for the winter, you first shock with chlorine, then when the chlorine drops to more normal levels, you add a bunch of PolyQuat and close up. That was their recommendation for winter closing.

Richard
I go the next step, wait 48 hours, and THEN shock the pool back up to 14 or 15 and close. This is the 4th year in a row I've opened to perfectly clear water in the spring. Junk on the bottom of course, but the water is clear and NOT green.