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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.
A solar pool blanket can raise the temperature of your pool anywhere from 10 to 15 degrees F-for between $75 and $150. Solar pool blankets might actually be thought of passive solar heating for your pool. They capture the heat of the sun in several different ways: Absorbent coloring increases solar heating.