Do solar blankets work?
If they have good exposure to the sun during the day, they will raise the temperature of the water 10 – 15 degrees over a few days. They also insulate the pool and keep the heat in over night. By eliminating evaporation, they also save on chemicals and water. Solar blankets definitely work in most situations—they are most successful in sunny environments in a mild climate. Solar blankets are made of lightweight bubble-type plastic material, which floats on the water surface. They retain heat and form an insulating layer on top of the water. Poor water balance can deteriorate solar covers.