I have a pool with a pool cover. It hardly loses any water to evaporation, and the cover heats the water so I don't use my gas burning heater either. The only

I have a pool with a pool cover. It hardly loses any water to evaporation, and the cover heats the water so I don't use my gas burning heater either. The only problem with the cover is that I need to keep a small pump on top to drain the rain water in the rainy season.