And, since the trichlor tabs are very acidic and drive your pH down, make sure your pH level is 7.8 or so before you leave to give some wiggle room there.
(By the way, when you return from vacation, I'd suggest that you stop using the pucks. You don't really want that CYA level to continue to climb. It's pretty high already, and those tabs have CYA in them.)
Bookmarks