RS Electrical RS – 8003 Eco Green Series Slim Hang On Filter with Surface Skimmer, 3 Layer Filteration | Low Power Consumption | Low Noise | 4.5W – 600L/Hr | Suitable for 3 to 4 Feet Tank

The filters are designed to be clipped onto the back of your aquarium. They are ideal for any aquariums where the submersible filters take up too much spaces. Instruction : 3 stages filtration: mechanical, chemical and biological. Eliminates some viruses and toxins on contact. Special active carbonized fibre cartridge with dual functions for mechanical and chemical filtration Bio-sponge enhances biological filtration and guaranties optimum colonization of nitrifying bacteria Wet/dry exposure generates more beneficial aerobic bacteria. Do not oil at any time.