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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.
Solar Covers are a complete waste of time and money. They are good for retaining the heat and preventing evaporation which happens to be the number one cause of heat loss for a pool. But for raising the temperature of the pool, they are a watse of money and not worth the cost.y pool is an L shape so it was always a hassle winding it up. Like JohnT says-Solar covers are very very good for keeping heat in a pool! During the last couple of weeks you could see the pool water evaporating causing both heat loss and water loss.