Capable of filtering up to 64 gph with adjustable flow rate. Requires no extra plumbing. Built in self adjusting surface skimmer for cleaning the water surface and promoting gas exchange. Uv sterilizer helps eliminate unwanted algae blooms and free floating parasites. Includes replaceable filter pad enhanced with aquatops bamboo carbon. Suitable for fresh water and salt water aquariums up to 15 gallons. Replacement carbon insert bci#003426. L x W x H: 8.75 x 5.5 x 5.5