Swimming pools lose heat in various ways but the biggest cause of energy loss is through evaporation and the process by which water evaporates which uses the most energy.
A pool cover helps you save energy and water by reducing the rate of evaporation of water. By closing the pool when not in use, you significantly reduce the amount of energy needed to keep the pool at a swim-friendly temperature.
There are many styles of retractable electric pool covers to choose from, but if you want to use very low technology, large, thick plastic sheets can be used. This is not the best choice because it is not easy to use, take off, or store. In an emergency, you can use one but for the long term, it is not the best choice.
You can buy a cover from the internet, from most pool supply stores or pool maintenance professionals you might even have access to it. There are many styles, sizes, and materials available as well as options for retracting and storing covers. Very popular for various reasons is the sun cover. They are sometimes called bubble caps and are made of durable plastic and UV inhibitors.
If you have a pool cover and have had it for a number of years, it might be time to see improvements because there have been many technological updates in recent years. You can even buy an electric powered cover that opens and closes by pressing the button instead of the crank handle. This blanket slides on a hidden rail located under the coping pool.
Another option to consider is the safety cover. They work the same way as the cover described above but are more expensive. With a safety cover, you get a cover for a swimming pool that can support a person's burden – something that can be useful if a child comes out without proper supervision.