The Marina Power Filter for Aquariums features a unique, compact design with quick startup and quiet operation. Installation is easy with no priming required, and maintenance is simple and convenient. The filter comes with two filter cartridges: a Bio-Carb and a Bio-Clear. Both contain Ceramitek, a highly porous ceramic filter medium that provides biological filtration for a healthier aquarium. The Marina Power Filter is equipped with an adjustable flow control and includes a strainer sponge to keep smaller fish from being pulled into the filter.