I'm in East Tennessee (knoxville area) and am waiting on the temperature of the pool water to drop to below 60 degrees before closing(leaves permitting!) and planning on an early opening before 60 comes again. It is looking like the first or second week of November before the water temperature gets to 60 or below(64 degrees today). With an early opening that should give me approx. 3.5 to 4 months closed. I was wondering if anyone in E.TN. let their pools run year around even though we get extended cold weather in late winter?? Wife said she would enjoy seeing sparking water versus green mess for the winter months!!