The SuperFish Corner-Flow 400 hang-on, advanced internal filter provides high performance in a compact, space saving design. Suitable for aquariums up to 200 litres, this powerful corner filter features an adjustable flow rate of 200-400 LPH. Providing effective mechanical, biological and chemical filtration the SuperFish Corner-Flow Aquarium Filter range feature a simple replaceable filter foam cartridge system. The Crystal Clear Filter Cartridge contains activated carbon and zeolite to ensure a clean and healthy aquarium. For optimum performance and efficiency, the filter media cartridge should be replaced monthly. The Corner-Flow 400 Filter also features a clever integrated space for the easy addition of an optional SuperFish ECO 100w Heater. Featured in the popular SuperFish QUBIQ 60 and QUADRO 70 aquariums the Corner-Flow 200 is suitable for open topped tanks with a glass thickness of up to 6mm. SuperFish Corner-Flow 400 Filter Key Features: Crystal Clear Cartridge - Easy to replace filter media Effective Triple Filtration - Sponge, activated carbon & Zeolite Upgradeable - Integrated space for optional heater Safe For Small Fish - Grid prevents small fish from entering filter