Seachem Tidal 55 is 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 a surface skimmer, adjustable flow, maintenance monitor, self-cleaning impeller, and a filter basket that holds any kind of filtration media. The Seachem Tidal Filter Series is designed to deliver the highest water quality possible with maximum versatility and ease of use.