Maybe I missed something and maybe this is a stupid question -- are you trying to keep your pool warmer, or cooler? I'm thinking warmer.
Just a thin bubble wrap solar cover on top is probably going to make more difference than anything else. In my experience it cuts overnight heat loss in half, and overnight is where you are losing any temperature gains you made from the sun during the day, and during the day it prevents evaporation which causes cooling.
Just a thin bubble wrap solar cover on top is probably going to make more difference than anything else. In my experience it cuts overnight heat loss in half, and overnight is where you are losing any temperature gains you made from the sun during the day, and during the day it prevents evaporation which causes cooling.