Additional photoPower filter that runs inside of tank (eliminating the leaking risk of hang-on and external filters)Includes 160 gph pumpIncludes mechanical filter pad, activated carbon and nano-ball (bio ball) biomedia, 2 internal drip trays and mounting suction cupsFor freshwater and saltwater fish-only aquariums up to 30 gallonsDimensions: 7.75"H X 4.24"W X 2.25"DEfficiently skims the aquarium water surface. Unlike traditional power filters, the SubCurrent removes dirt and dissolved organics from the surface of the water--eliminating those unsightly oil slicks.