Hydor 60701150 Koralia 3G Third Generation Circulation Pump, 1950Gph/6.3watt 1950 gph 6.3 watts Smaller profile than earlier versions of the Koralia Pump. Dimensions of pump inside tank: 4-3/8" X 3" X 3" (assumes you're using the flow diffuser) With the new Dual Magnet Support System (DMSS), the pump can pivot in virtually any direction Includes a small fish guard (smaller fish and shrimp) and a large fish guard (small to medium fish and shrimp)