Water Tank Cleaning The goal here is to get rid of accumulated sediment, algae, and bacteria. Water Suction: Completely empty the tank of remaining water using suction pumps. Mechanical Cleaning: Scrub the walls and floor thoroughly to remove dirt and suspended matter. Sterilization: Use safe sterilizing agents (like chlorine in measured concentrations) to eliminate bacteria and fungi, then rinse the tank several times to ensure it is free of any chemical residues. 2. Water Tank Insulation Insulation protects the tank from internal leakage (water loss) and external leakage (entry of groundwater or contaminated water into the tank). Most prominent types of insulation materials: Epoxy Insulation: One of the best and safest materials for drinking water tanks. It is a smooth material that prevents the growth of bacteria and algae and is resistant to acids and moisture. Cementitious Coating: Very excellent for underground concrete tanks, as it penetrates the pores of the concrete and effectively and strongly prevents water leakage.