Candi said:
JasonLion said:
The great majority of the "keeping heat in" comes from stopping evaporation. Any solar cover will do that. There are some small additional gains to be made by increasing the R-value by using something thicker or specially insulated, but the great majority of the savings is from simply having a cover at all.
So would it be reasonable to use a winter cover instead of purchasing an additional solar cover?
Probably not. Solar covers are fairly cheap until you get to larger pools. The inconvenience of moving a winter cover, the fact that it lets no sunlight into the water and the shortened life of the winter cover would probably negate any savings. Anchoring a winter cover would be an issue to, since the solar cover is sized to float on the water with no overlap so the wind won't lift it.