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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.
Floating Solar Heaters for Pools. Using solar power to heat a swimming pool saves on electric bills and helps reduce demands on the community power grid. Simple, do-it-yourself solar heaters that float on top of the pool and warm the water underneath are within the reach of almost any pool owner.