What is Swimming pool?
[[File:Outdoor Swimming Pool on a Sunny Day.JPG|thumb|An outdoor swimming pool]] A '''swimming pool''' is a [[wikt:tank|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 exercise, floating on inner tubes, or cooling off on hot days. Various methods are used to keep [[algae]], [[Pathogen|germs]], and other bad things out of the pool. The [[chemical]] [[chlorine]] kills [[Germ|germs]] and [[algae]]. Sometimes [[sea water]] is also used for this. The filtration system is also used for this. [[Pump]] and [[Filter]] are two main components of a swimming pool filtration system. ==Types of pools== Some pools are indoor so they can be used when weather is bad. Most are outdoor. There are different types of swimming pools. *The competition pool. [[Swimming]] [[competition]]s can be held there. Competition pools are usually very large, and usually either 25 or 50 m long and their deep end is 2 to 5 m deep. They have usually 4 to 8 [[lane]]s. *A play pool is made for children, and quite shallow, typically no deeper than five feet (1.5m). Play pools can have a decorative shape. *A freeform pool is built generally to imitate a natural lagoon pool or small oasis. It will have a natural uneven shape, and will often have features around it like rocks and waterfalls to compliment the naturalistic style. *A [[geometry|geometric]] pool has even lines and features. Usually built in a rectangular shape, this pool is considered the “traditional swimming pool” style. *Lap pools are built so that people can swim laps for health and fitness. They tend to be long and narrow, usually over fifty feet (15m) long. *[[Diving]] pools are built deep; most are 3 to 6 m deep with a diving board or a platform, or a jump tower. The Olympic diving tower has platforms at 1 m, 3 m, 5 m and 10 m height. *Infinity swimming pools (also referred to as infinity edge swimming pools