SeaChem Large Aquarium Fish Tank Filter, Tidal 55 Gallon (200 Liters) by SicceTidal Power Filters are designed from the ground up to provide your aquarium with high quality, comprehensive filtration. They are easy to use and adaptable to a variety of aquarium conditions. With a host of features including a self priming pump, dual water intake with surface skimmer, adjustable flow, maintenance monitor, self cleaning impeller, and a filter basket that holds any kind of filtration media and more of it Tidal Power Filters are