A UV Water Purification is the water treatment done for the survival of the water creatures. UV Water Purification is widely used in aquariums so that the algae levels are controlled. UV Water Purifier also takes care of mould and yeast in an aquarium and thus lends many benefits to the fish and other water creatures.
One cannot really do anything to the natural way of living but one can speed up things and thus water is made clear and fresh.