I have had an above-ground frame pool for more than 10 years. (I started with a 10' x 16', and now have a 9' x 18' intex ultra frame pool). Since DAY 1 of that 10+ years, I have been trying to figure out a low-cost/natural way to heat it. I have had a total of 3 (including replacements) Solar Bear solar panels, all of which somehow got holes in them. This past year, I put together a DIY solar panel using coiled black garden hose, but the results were insufficient. I live in Pennsylvania, and the weather was "spotty" - without a lot of sun. I NEED the pool to be extremely warm, or I cannot swim in it. (Average water temperature was between 80 - 85. It needs to be warmer). A hot pool on a hot day does not bother me as much as a cold pool on a hot day.
I have researched "waste heat recaputure" (using the waste heat from your central air unit to heat the pool). The only problem is that 1) it costs well over $1,000, and I am not sure if it is cost-effective (you may need to run the pool the whole time the central air runs); and 2) I have not seen any advertising for anyone who does this LOCALLY.
I am looking to do something that is directly plumbed into the pool pump and filter system, without having to use extra gas or electricity. Any suggestions on how to get the warmest water possible in the most economic way possible would be greatly appreciated.