Pure, clean water at all times and for all purposes -, domestic or industrial - isType Water Tank is designed to deliver. The specifications and exclusive design features of the system protect against any occurrence of static water, growth of algae, contamination from corrosion or bacteria, or accumulation of externally introduced material.NO ALGAE GROWTH. The growth of algae and other micro-organisms is closely related to light. To prevent this requires the light transmission of less than 0.1% in direct sunlight. All standard FRP Round Type Water Tanks molded have a light transmission of less than 0.005%, to prevent algae growth even if the tank is installed in full sunlight. Growth of algae, if allowed to occur, will adversely affect water taste, and can lead to disease such as gastro-enteritis.introduced material.