Fluval U4 Underwater Filter


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  • Designed for aquariums up to 240 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

What’s Included

  • 2 Foam Pads
  • 2 Poly/Carbon Cartridges
  • BIOMAX Biological Rings


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