All tanks are engineer designed to above Australian design standards. Tanks can be constructed in various sizes starting at 25,000 liters up to 1,000,000 liters (2,200 gal to 220,000 gal). For the past two decades Australians have depended on concrete water tanks more than any other type, to store and protect their most valuable resource. Water stored in an enclosed concrete tank is always cool, clear and algae free, and concrete tanks clearly outlast the rest.