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The Fluval U3 Underwater Aquarium Filter System (A475) is a 3 stage aquarium filter unit for aquariums up to 40 gallons. The Fluval U3 Aquarium Filter System uses three stages for superior water quality and recirculation in aquariums, including a foam pad mechanical filter, a combination chemical carbon and poly foam filter, as well as an advanced Fluval BioMax biological aquarium filter media. The three aquarium filters used in the Fluval U3 Aquarium Filter System include:
The Fluval U3 Aquarium Filtration System is engineered for top performance in aquariums up to 40 gallons, providing maximum filter surface area and optimum filter dwell times to provide superior aquarium filtration and water recirculation. Compared to many other aquarium filters, the Fluval U3 Underwater aquarium filter runs smoothly and quietly. Equipped with a flip top lid, it is designed for easy maintenance and quick filter changes.
The Fluval U3 Aquarium Filter System is also known by Hagen part number A-475.