The Penn-Plax Cascade 300 Internal Aquarium Filter is designed to provide better filtration and aeration above and below the surface. Fully submersible, this aquarium filter provides physical, chemical and biological filtration for fish tanks upto 38 liters in size. The activated carbon cartridge removes harmful chemicals, toxins, odors, and other contaminates from your aquarium’s water. Also included is an internal sponge that optimizes colonization of beneficial anaerobic bacteria. The large capacity internal filter cup allows you to choose your own filter medium according to your needs. This aquarium filter has an adjustable and directional water flow output, pumps up to 265 liters per hour, and a spray bar option that will distribute water evenly to aid aeration. The round directional flow spout has a connector where you can connect to your flexible tubing to drive water fountains or other accessories. The Cascade 300 Fish Tank Filter mounts quickly using the included suction cups and can be placed horizontally in order to remove from view. Great for aquariums and terrariums, these filters give you crystal clear water in your fresh or saltwater environments. The Cascade 300 Aquarium Filter measures 6 inches long by 2 inches wide by 3 inches deep and runs on a 220V electrical current and comes with 2-PIN plug.