What Water Temp Is Safe to Close Your Pool?
My neighbor closed her pool two weeks ago and keeps telling me I should have done the same, but my water is still sitting in the low 70s°F and I'm genuinely torn. Trying to decide between shutting everything down now in late September versus waiting another few weeks to see if temperatures drop more. I have a 20,000-gallon inground with a mesh safety cover, and I really don't want to pull it off in spring to find a swamp underneath.
Everybody seems to have an opinion on closing timing, but I can't find anyone who actually gives a specific water temperature to aim for. Is 72°F still too warm? Will algae keep growing under the cover if I close now, or does it just stop once I add the closing chemicals and block the sunlight? I'd love to understand what's actually happening chemically so I can make the right call rather than just guessing.…more
Everybody seems to have an opinion on closing timing, but I can't find anyone who actually gives a specific water temperature to aim for. Is 72°F still too warm? Will algae keep growing under the cover if I close now, or does it just stop once I add the closing chemicals and block the sunlight? I'd love to understand what's actually happening chemically so I can make the right call rather than just guessing.…more



