An excellent choice for the introductory level Aquarist. Large open area for Protein Skimmer use as well as a spacious return pump chamber. Designed for use in modern Reef Tanks with a full line of accessories available to enhance your Aquariums sump filtration system. Feel the happiness you will experience with ESHOPPS NEW RS Reef Sump line. Specifications - Item#: 89124 - Dimensions: 20"x10"x16" - Skimmer Compartment: 6"x9.5" - Return Compartment: 5"x9.5" - Tank Usage: 10-75g - Filter Socks: 4" - Total Water Volume: 12 gallons - Max Sump Flow Rate: 600gph