The process of removing sediment, impurities and unwanted odors from inside water tanks. This is usually done using appropriate tools and equipment to reach inside tanks, such as pumps, brushes and protective clothing. The process of cleaning tanks includes emptying the existing water, then cleaning the walls and floor of the tank using safe and appropriate cleaning materials. The tank is then thoroughly rinsed and dried with dry air sources before being refilled with clean water. The tank cleaning process aims to ensure the purity of water and protect the health and safety of individuals.