The Berlin filtration system is an easy and inexpensive filtration option for your reef tank. Biological filtration comes from the live rock in the tank. Organic waste is removed by the use of a Protein Skimmer. BL-45 Specifications: - 2 x 1" female threaded inlet and and 1 x 1" outlet. - An inexpensive filter which has a very low maintenance / husbandry requirement. - Dimmensions: 36"L x 16"W x 18H" - Skimmer Chamber: 15.5"x 12" - Sump Chamber: 15.5" x 14" - Pump Chamber: 15.5" x 9" - Max. Flow: 1,200 gallons - Rated for tanks up to 225 gallons - 3 year warranty - High Quality cast acrylic construction