KollerCraft TOM Rapids Pro RP3 Wet/Dry Filter System Advanced six-stage filtration system for larger saltwater aquariums (up to 125 gallons); flow rate of 700 gallons per hour (GPH) Processes waste and impurities to keep aquarium water crystal clear and tank inhabitants healthy Gravity-fed Auto Fill System compensates for water evaporation, adding water back to aquarium as needed Includes built-in protein skimmer and overflow box Comes with all necessary hosing and tubing, plus poly-fiber filter media