The thing works

I put this in about a week ago along with the solar blanket to cover my 24 foot round above ground pool. The water temp when I installed them was 61 degrees. Today, about a week later, the combination of the two brought my water temp up to 77 degrees. To add to that the universal sun heater is only in the sun for about 2 to 3 hours a day. I can't even imagine what it would be if it were in direct sunlight for 5 or 6 hours.

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