With rotating bio-wheel: Patented bio-wheel technology provides excellent wet/dry biological filtration. Multi-stage filtration: Delivers mechanical, chemical and biological aquarium filtration to maintain a clean aquatic environment. Powerful: Certified flow rate of 400 gph in aquariums up to 80 gallons. Discover our filtration products: Count on our brand for the most reliable, technically advanced aquariums and accessories on the market. Replacement cartridges: Use with two rite-size e filter cartridges (purple label).