Question

Visit a swimming tank in your locality. Observe how the water in the tank is changed. 

Answer 1

• I visited a swimming tank in my locality and observed how the water is kept clean and safe.
• The water in the tank is usually not completely changed every day. Instead, it is continuously circulated through a cleaning system.
• The water first passes through filters, which remove leaves, dust, hair and other visible impurities.
• After filtration, chlorine or other disinfectants are added in the correct quantity to kill harmful germs and bacteria.
• The pH level and chlorine level of the water are checked regularly to make sure the water is safe for swimmers.
• Dirty water is removed through drainage outlets, and fresh water is added whenever necessary.
• If the water becomes very dirty, cloudy or contaminated, a larger quantity of water may be drained out and replaced with fresh water.

Thus, the water in a swimming tank is maintained through filtration, disinfection, circulation, cleaning and periodic replacement.