The Bio 45 Wet/Dry Filter is the most complete filtration system for your fish only tank. While it can be used in a reef environment, it's self contained biological filter chamber allows for maximum performance in your display tank. This powerful filter includes large pre-skimming chamber that easily fits most in sump skimmers and an easy access drip chamber for mechanical filtration. As with all our Bio Filtration units, the Bio-45 can be used with external or internal pumps allowing you the flexibility to choose/change your pumping method without expensive conversions. BIO-45 Specifications: - Skimmer Chamber: 15.5" x 12" - Dimensions: 36L" x 16W" x 18H" - Bioballs: 5.6 gallons Max. Flow: 1,200 gallons - Rated for tanks up to 225 Gallons - High Quality cast acrylic construction - 3 year warranty