A swimming pool is a tank or large basin that is filled with water and intended for recreational or competitive swimming or diving. Pools are also used for other bathing activities, such as playing, wading, water exercising, floating on inner tubes, or cooling off on hot days. The chemical chlorine is usually used to killing germs and algae. Sometimes sea water is also used to maintain pool algae free. The filtration system is used to keep algae and other hazardous contaminants at bay. Pump and Filter are two main components of a swimming pool filtration system.