I don't heat my pool but I've been intrigued by the solar panel idea and even more intrigued by the idea of running water through a coiled hose loop. I got this idea earlier this year when I ran my garden hose. The hose had been stretched out a full 100 feet in the sun and when. I opened the spigot, walked to the end of the yard where the hose end lay and turned it on. The water that came out was super super hot and it made me wish I had run it into my pool. Later I thought it would be a good idea to somehow run a set up off the pump that took cold pool water in and pumped it back in the pool after a circuit around a stretched out sun heated hose. Well...I checked youtube ( http://www.youtube.com/results?searc...be.nRTVaqD97Xg ) and don't you know there are dozens of all kinds of jury rigged set ups using hoses....check out the link...