Our complete line of UV sterilizers and UV clarifiers can help maintain a healthy pond or water garden. UV clarifiers and UV sterilizers use Ultraviolet light to damage the cellular structure of free floating algae that passes through them. The damaged algae will clump together with other algae cells and either settle to the bottom of the pond or will become trapped up by the skimmer or filter. A UV clarifier or a UV sterilizer can be just what your pond or water garden needs to maintain vitality.