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#: 89144 - Dimensions: 30"x12"x16" - Skimmer Compartment: 11"x11.5" - Return Compartment: 6"x11.5" - Tank Usage: 125-225g - Filter Socks: 2 x Rectangular - Total Water Volume: 23 gallons - Max Sump Flow Rate: 1250gph