Laguna Plastic PowerFlo Ponds Skimmer Filter, 5000-Gallon Trench coat is 2011 fall and winter collection for larger dogs Provides superior mechanical and biological filtration in ponds up to 5000--Gallon All chambers have built-in handles for easy removal, cleaning and media replacement Includes a Laguna coarse mechanical biological filter pad as well Laguna biospheres biological filter media Measures 35-inch length by 22-inch height by 22-1/2-inch width