Cute Young Brunette Girl Undresses Her Blue Bikini At The Swimming Pool

Swimming pools are also used for events such as underwater hockey, synchronized swimming, water polo and canoe polo as well as for teaching diving and lifesaving techniques. They have also been used for specialist tasks such as teaching water-ditching survival techniques for aircraft and submarine crews and astronaut training. Round-cornered, irregular swimming pools, such as the Nude Bowl, were drained of water and used for vertical skateboarding.
Sanitation
Swimming pool water must maintain low levels of bacteria and viruses to prevent the spread of diseases and pathogens. Bacteria, algae and insect larvae can enter the pool, if water is not properly sanitized. Pumps, mechanical filters, and disinfectants are often used to filter the water.