An economical three-stage filter. Debris is first strained out by the filter brush, then a profiled filter sponge traps most remaining particles. Finally, water passes through bio-media where beneficial bacteria thrive, removing ammonia and nitrite. The revolutionary design of these filters combines mechanical filtration and biological filtration to guarantee clear purified water. Periodic filter foam rinsing & foam replacement is the only maintenance required. Attractive green color blends easily into landscape. Rated For Ponds up to 3000 GALLONS 15 Watt UV BULB INCLUDED Combined U.V. and Biological Filtration for crystal clear, purified water Flip up lid for easy maintenance 'Frostproof' quartzless U.V. chamber Removable media trays Recommended Pump : CLICK HERE >>AAN00248 Includes SUPRA Bio Media Coloured green to blend in with natural surroundings Dimensions (H x L x W): 13" x 24" x 16" Inlet Size - 3/4" barbed Discharge Size - Dual 1-1/2" Application - Above-Ground, Gravity Discharge Manufacturer's Warranty - 3 year (excluding filter foams & UVC bulb)