Key Features The Interpet Internal Cartridge Filter is the ultimate in compact filters for your Aquarium. Using an effective four stage filtration, the filter pumps the dirty water through the four layers to produce clear and healthy water. Stage One . The water passes through bio media which acts as a home for essential bacteria which removes toxic fish waste. Stage Two . Mechanical floss then clears the water by trapping fine waste Stage Three. The water then passes through carbon which purifies the water by removing dyes, toxins, heave metals and odours Stage Four . The final stage has a unique Algaway pad that reduces unsightly algae by removing phosphate, algaes favourite food. The result is crystal clear and healthy water being filtered back into your aquarium Don’t forget to change your cartridge and Algaway pad to keep your aquarium clear and healthy. Service packs are available to purchase Specifications CF3 Max Flow Rate: 700 LPH (153 GPH) Power: 12 Watts Aquarium Size