Penn-Plax presents the Cascade 300 Fully Submersible Internal Filter. In addition to delivering crystal clear water throughout the aquarium. This filter cycles water at 70 Gallons per Hour (GPH) for tanks up to 10 Gallons in size. It's great for Freshwater and Saltwater aquariums, along with a variety of Terrarium setups. Accommodating: The adjustable flow switch allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. The directional flow nozzles allow for additional tank customization and convenience. Furthermore, the filter utilizes 4 suction cups, allowing for both vertical and horizontal mounting positions. Fully Submersible: The Cascade 300 utilizes 2 filter media chambers, and comes with filter media: 1 refillable Carbon Cartridge and 1 Bio-Sponge. This filter traps excess food and fish waste from your aquarium's water. Venturi Aeration: The Cascade 300 features Venturi Aeration, which provides your tank with filtered, oxygenated water. This feature eliminates the need for an air pump. Instead of two separate units, this filter combines both functions: simply connect the Air Tube and Air Muffler to the Flow Nozzle, and follow the included instructions. Please fully submerge and fill filter with water before turning on. Aerating Spray Bar: In addition to the two Flow Nozzles and the Venturi Aeration, the Cascade 300 includes a Spray Bar that evenly distributes filtered water over the surface of your aquarium. Measurements: 5.75” (L) x 2” (W) x 2.5” (D).