On Wed, 15 Aug 2012 17:39:00 -0400, Duesenberg wrote:

Solar cover is great for keeping heat in but the water heats better when
the sun shines on it.

I have a solar cover that floats on the pool surface. My utility
company even offers rebates to use them. I put solar panels on the
roof that are much better for an extra month or three of swim time.

The solar cover on the pool surface traps leaves under it after
storms, collects piles of dirt and dust on top,. I stopped using it.
I'm in the Mojave desert.

Being large enough to cover the pool, I may cut it into large size
giant Lilly pads that float freely, but give some heat in the early
season.
--