agree with all..i am really amazed at how much less evaporation occurs thanks to my solar cover...i also note that given my pool heater is out of commish and the pool isn't swimmable, i've simply left the cover on a lot more. i suspect that the cooler pool temp has helped, but even with it on days at a time in 25 to 29C weather, i've had little to no algae..

now, if only i could get my new pool heater going!