The FiltoClear pressure filter with built-in UV Clarifier and patented Easy-Clean function is an ideal addition to koi and fish stock ponds. A hard worker, it combines mechanical and biological cleaning and serves as an effective UVC technology to clean green water. Treated water flows through fine and coarse mechanical and large pored biological filter elements and decomposes pollutants to clarify the water. FiltoClear's patented Easy-Clean technology addresses filter and UVC maintenance in minutes. It is praised for its ease of use and eco-friendly benefits.