Tips, suggestions on what type of solar cover to buy & where?

[darrin]

I have used two types of solar covers. One was a dark blue with a silver backing and the other is clear. During the day the blue/silver would warm the water slightly on a sunny day. I would not recommend any dark solar cover. The clear cover works much better because it allows sunlight to pass thru and prevents evaporation. It warms the water much better.

Some people might tell you that the cover should only be used at night to prevent heat loss and that they really dont warm the water during the day. That is not the case with a clear cover.

[tenax]

mine is living proof a blue cover will indeed warm up the water during the day..you can feel the difference in the temp about a foot deep if the water is not circulating at the time..5-6 degree rise in temp for me

[MTU 5.0]

Thanks for the responses. A couple more questions though......

How big are your covers and what did you pay?

[CarlD]

OK, ALL solar covers will warm the water in sunlight--and all will insulate at night.

But my experience has been that the clear, heavy-weight covers do best. They pass the most light, and they insulate.

Opaque covers work by conduction, but transparent ones work by letting the light heat the water directly. More like a true greenhouse. There are also blue transparent covers. They don't work as well but look a little nicer.