Closing my 13,600 gallon AGP in Virginia Beach, VA for the first time. I have watched the TFP videos and read some posts. Right now do i have 2.6 FC with 40CYA. TFP calculator says 8FC is outside target range but chart says 16. How much 10% chlorine should I add ? Do I just add it once and run 24hrs before drain and close? Or do I add some more throughout the winter? Some posts say don’t add Polyquat 60, should I? Should I get skimmer cover and return plug and not drain?
