Marineland Bio-Wheel Penguin 75 Power Filter, 10-Gallon 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 The penguin power filter requires virtually no set-up, making it perfect for any fish lover Convenient penguin rite size "a" cartridge comes ready to use with each filter