I am thinking that as much as I love my little pool,(18') some heat in it would be wonderful. Here in Michigan the water temps never got much above 80* last year. I am wondering if I could put a 4x20 solar panel on the roof of our garage to generate some much needed warmth? Our yard is partialy shaded where the pool is, but the garage isn't. My cartridge filter won't have enough juice to get the water up the garage and back, so what kind of a pump would I need? Any ideas would be great. Thanks, Kimrst