I stopped by our Ocean State (central CT) today pick up a couple cases of shock. They've swapped out their stock for winterizers, so no more cheap chlorine. I take this as a sign of end of season. We usually go through 2-3 gallons a week so I'll run completely out this weekend. I think I should close it up early before it reverts to green. Either that or start using tabs which I have a small stockpile of. Thoughts?