Marineland Penguin 75 GPH Power Filter / Cartridge Bundle Marineland Penguin 75 GPH Power Filter and Pack of 3 Refill Cartridges Bio-Wheel technology delivers a three stage mechanical, chemical, and biological aquarium filtration Certified flow rate of 75 GPH (gallons per hour), perfect for aquariums up to 10 gallons Meets the highest standards of water purification and operational ease The penguin power filter requires virtually no set-up, making it perfect for any fish lover