We've had our AG pool for 4 years and are considering buying a solar cover mainly to use in early spring and early fall when the outdoor temperature is warm enough to swim but the water is too cold (i.e., this past week, the outdoor temp has been in the mid 80's, but the pool temp is mid 70's). Our pool is in direct sunlight most of the day. I'd like to know how a solar cover works. I've read too much on the web, and am confused above when to place the cover on the pool. Any help would be appreciated.