The new Fluval UVC In-Line Clarifier can be quickly and easily connected to most canister filter setups with 16 mm hose connector. The UVC In-Line Clarifier eliminates suspended bacteria and algae for a clear and healthy aquarium. Fluval CCFL technology attacks green and cloudy water by applying powerful, DNA-destroying UVC light emissions. This natural process is chemical-free and will not affect beneficial, surface-dwelling bacterial colonies that are already established. With its distinctive compact design, the unit fits neatly within aquarium cabinetry without cluttering existing filtration systems.Fluval UVC In-Line Clarifier+ a chemical-free and maintenance-free way to purify water+ eradicates suspended bacteria and algae in the water column that contribute to cloudy and green water, respectively+ helps prevent the growth of cyanobacteria that often smothers and destroys aquatic plants+ does not harm beneficial, surface-dwelling bacteria+ condensed design redirects water flow up,