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Christmas Sale Fluval U4 Underwater Filter Series [uUCzvrNM]

$26.99 $86.99 -69%

Offering outstanding 3-stage filtration, increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible.FeaturesDesigned for aquariums up to 65 US Gal / 110 LUse as a p

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Offering outstanding 3-stage filtration, increased water movement and vital aeration, Fluval U-Series internal filters are the perfect solution where external filtration is not possible.

Features

  • Designed for aquariums up to 65 US Gal / 110 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

Other sizes available :

  • A465 Fluval U1 Underwater Filter, for aquariums up 55 L (15 US gal)
  • A470 Fluval U2 Underwater Filter, for aquariums from 45 to 110 L (12 to 30 US gal)
  • A480 Christmas Sale Fluval U4 Underwater Filter Series [uUCzvrNM], for aquariums from 130 to 240 L (34 to 65 US gal)

What Our Customers Say

January 1, 2026

Absolutely no complaints!

This product is a superb item. I'm very glad I bought it.

- Maverick O..

January 1, 2026

Absolutely no complaints!

It's a purchase that I feel smarter for having made.

- Paige I..

January 1, 2026

Absolutely no complaints!

This product is a brilliant choice. I am extremely impressed with this.

- Dustin F..

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