Have been using a blue solar cover since opening (in NJ) late April. It's done a great job keeping the pool temp up, keeping evaporation down, and chlorine use down. But...
Pool is now a bit too warm for me at 91. I like it around 86-88. So, I plan on leaving the cover off at night at cooler temperatures. I figure evaporation is less at night (can anyone confirm this?), chlorine loss will be minimal because no sunlight, and hopefully the pool drops a degree or two or three.
The question is during the day - am I better off NOT using the cover? I know the chlorine use and evaporation will both increase, but what about the temp? Does the air temperature have anything to do with heat gain/loss?
I also understand that you can use a fountain to reduce the temperature (as well as aerate), but you can't use a fountain with the pool cover on !!