A water tank is the main source of daily water supply for every household. Even though most of the water tanks are tightly lid, over time, sediments and other dirt from the water supply get deposited in the tank and need to be cleaned. Water tank cleaning is very important to remove sedimentation, algae and dirt accumulated in water tank. Water tanks must be cleaned at least once per year. Water tank cleaning takes couple of hours and requires at least 2 PROs. Cleaning time and prices depends upon the size of tank.