Lotus Green Genie gravity fed pond filtration systems have been developed after consultation with water garden professionals and specialists in the field of water treatment. The award winning Green Genie combines one of Europe’s most successful bio-filters with state of the art U.V. technology. Dimple foam and Flocor® filter-medium combined with an integral spray bar ensure optimum mechanical and biological efficiency. The proven technology of the Lotus ultra violet clarifier completes the clear water process. All Green Genie models are fitted with a Vari-Flow valve which allows the system to be used with all pumps without overflowing Suitable for ponds : Low Fish Stocks: 12000Lts/2600Gals High Fish Stocks: 4000Lts/880Gals Combined UVC: 16 watts Recommended Inlet Hose: 19/25/32mm Oulet Pipe (Rigid): 2x32 mm