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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.
1 Solar pool covers can extend your swimming season and reduce the amount of water that needs to be added by 30 to 50 percent.  They can also reduce the amount of chemicals a pool needs by 35 to 60 percent, and help keep dirt and debris out of the pool, which reduces cleaning time.