Natural Swimming Pool/Ponds (NSP's) are a chemical-free, low-maintenance alternative to traditional chlorine pools. The water is clean, crystal-clear, and filtered naturally using a built-in biological filter.
Swimming pools require proper cleaning and maintenance. The various maintenance steps involve cleaning debris with a leaf rake, brushing the walls of pool, vacuuming the pool, cleaning the pool filter, check the pool PH level, santise with chlorine tablets, pool shocking, etc. For more details go through this infographic.
Nemo 33 is the deepest indoor swimming pool in the world.The pool is located in Brussels, Belgium. Its maximum depth is 34.5 metres (113 ft). It contains 2.78787 million litres of non-chlorinated, highly filtered spring water maintained at 30 °C (86 °F) and holds several simulated underwater caves at the 10 metres (33 ft) depth level.