Solar Blankets....really worth the trouble ????

[Poolsean]

without a blanket, you retain approx 50% of heat.
with a liquid solar blanket, you retain approx 65-70%
with a solar blanket, you retain approx 80%

There's newer type "solar" cover in the form of MANY small circles that floats on the top. Add enough and you can cover the surface, or at least retain more heat than without anything. AND anyone can handle them.
I'll have to find the manufacturer name...

OK, found it, http://www.solarsunrings.com/index.html