Quote Originally Posted by matt4x4
Carl, since my pool only has a skimmer and return, with a blue solar cover on during the day, unless I point my return down, I would not get the heat down there since it would all stay up top (no bottom drain), so essentially - no convection.
As soon as you add a bottom drain, it's a whole different scene, change the solar cover to clear - whole new scene..
I think this topic has about a million different combinations with different results for each.
My choice for solar covers would be opaque or reflective underside, in that order.
Ah! I see. I've had the opaque, blue on top, black on bottom covers. I've had the transparent blue one. I've now got the transparent clear, heavyweight one and it seems to work best, espec with solar panels.