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Solar Covers heat your pool in two stages: first by absorbing solar energy to heat the pool, and then by retaining the heat to keep the water warmer longer. The small bubbles on the Solar Cover are filled with air that heats up when the cover is in the sun.
Use a solar blanket. Solar blankets are pool covers designed to soak up solar energy and transfer it directly into the water. These covers can help increase water temperature by about 5Â°F for every 12 hours of coverage. Solar blankets also insulate the surface of your pool, which prevents the heat from escaping.