I have about a 20k gallon inground pool with a salt cell and sand filter. I am trying find a way to heat my pool in the most efficient way possible. I get about 6.5 good hours of direct sun during the summer and just need to raise the temp about 8-12 degrees. We love spending the summers in our backyard oasis just need a few more weeks of it a year. I look forward to being a member of this community.