Dual pumping power provides ultimate Power Filter perfomance in the impressive line of Marineland Emperor Power Filters. Emperor Filters feature two separate water pumps to ensure balanced aquarium filtration. Emperor Filters perform excellent 3-stage filtration in both freshwater and saltwater aquariums. Water is pushed directly through mechanical and chemical filtration stages, water is also pressurized and directed to the Bio-Wheel system via an adjustable spraybar. Maintenance is simple with easy-to-use Emperor Filter Cartridges.