Fluval U4 - Internal Filter

By Fluval


  • Designed for aquariums up to 65 US Gal / 150 L
  • Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums
  • Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature
  • Position vertically against aquarium wall to create currents or customized flow patterns
  • Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement
  • Adjustable 3-way flow control
  • Top Output for circulation and oxygenation, Integrated Spray Bar for a gentle even flow, and Bottom Output for deepwater agitation
  • BIOMAX biological media included
  • Made in Italy
  • Ideal for freshwater, saltwater and reptile environments