High Performance Filters! The filter provides mechanical and biological filtration for optimal water quality and healthier fish. In the first stage of filtration, the water enters a chamber with a coarse filter brush that strains out debris, settling it into the chamber for easy removal. The second stage incorporates a specially developed, profiled filter sponge that traps most remaining particles. The final stage contains supra biological filter media for the removal of ammonia. Easy to maintain Filter brush, filter sponge, and SUPRA Bio Media included Designed to blend in with natural surroundings In Stock-Ships Fast Filter Features Filters Specifications Application: Bio Filter Tubing/Output Dia. 1D Max Flow Rate: 650 G.P.H. Inlet Diameter 3/4D Max Pond Size: 1000 Gallons Operating Watts 10 Strainer Surface 13 Outlet Diameter: 1.5 Color: Green Warranty: 3 Year