Hang on filters are designed to be clipped onto the back of your aquarium. They are ideal for garden aquariums or any other, where a submersible filter would take up too much space. They provide very high levels of filtration. Hang on filters provide return sales as the carbon filter cartridges are a consumable item that needs to be replaced every 6 - 8 weeks. Features and Benefits: Hang on filters are designed to be clipped onto the back of your aquarium. They are ideal for garden aquariums or any other, where a submersible filter would take up too much space. They provide very high levels of filtration. Hang on filters provide return sales as the carbon filter cartridges are a consumable item that needs to be replaced every 6 - 8 weeks. Features and Benefits: Flow regulator which can be used to adjust the water flow through the filter The combination of wool, carbon and bio grid provides a complete and very compact filtration solution Available in a range of sizes Excellent oxygen levels achieved due to the design Built in power heads offer high water turn over rates High quality media content 2 + 1 Year Guarantee Additional Info: Item No: 25028 Description: 500 ClearView Hang On Filter 500 L/hr For Aquariums up to (L/G): 120L/27G Max. Flow Rate: 500L/hr Wattage: 5.8W Voltage: 230V/50Hz Suitable for: Coldwater, Tropical and Marine