Marineland Penguin 200 GPH Power Filter / Cartridge Bundle Marineland Penguin 200 GPH Power Filter and 3 Pack of Refill Cartridges Certified flow rate of 200GPH, perfect for all aquariums up to 50-gallon, uses the Rite-Size C" filter cartridge" Delivers easy, three stage mechanical, chemical, and biological aquarium filtration Convenient Penguin Rite Size Cartridges come ready to use with each filter