PONDWORKS INTAKE FILTER 400 GALLON MECHANICAL / BIOLOGICAL FILTER Little Giant's 400 Gallon Mechanical / Biological Filter promotes the growth of beneficial bacteria to improve water clarity in a pond up to 400 Gallons. * Filters water before entering the pump and helps keep debris from entering pump and fountain nozzle * Low profile filter includes biological media 566143 for beneficial growth of bacteria * Large surface area for maximum filtration * Includes filtering pads - one coarse, one fine * Designed for non-potable submersible use * Compatible pumps: 566631, 566632, 566633 * Size 4.6"Height x 16"Length x 12"Width. Specifications : * Weight - 4.5 * Height - 4.6 * Width - 12 * Length - 16