Welcome to another episode of BRStv Flow Dynamics, where each week we dig into various pumps to show you a visual representation of their flow pattern to help you make a more informed decision on what will work for your tank. Hydor Koralia Magnums are an affordable and compact pump that offers a lot of "flow per dollar". They offer extremely low energy consumption, an electronic start up system, and high flow in a compact package. Features: Power Usage - 18 W Dimensions – 4.25" x 6.5" Maximum Flow - 3250GPH