Hello, this is my first post so sorry in advance. I have had my pool for 6 years and now realize I need solar heat. My surface area is 1,062sf and 40,000 gal. It's a kidney shaped so a solar cover is not an option for me (although I do use a chemical). I have researched the options and I see (3); flat plastic, vacuum tube and gobi collectors. Has anyone used these in a climate similar to mine? My garage roof (where I plan to mount) is south/west facing and unshaded till about 6:00pm. Not alot of wind. Any help I could get or a direction to search would be greatly appreciated. My wife and children would like the pool between 80 and 85 if possible. Thanks for your help.