Fluval U3 Underwater Filter - Up to 40 gal.

3 Reviews
SKU: 243651
Manufacturer: Fluval
MPN: A475

Shop in Retail Store

Ship to Home

Ship to Lancaster, Pa Store

Inventory is real time and can be impacted at any time.


Bring powerful 3-stage filtration and circulation to hard-to-filter places like aquariums, terrariums and turtle tanks with the Fluval U Series Underwater Filter. This completely submersible filter features a unique 3-way flow control spray bar that allows you to create water movement anywhere you need it. Efficient Fluval design uses a handy flip-top to make media replacement simple and fast.

For more info on Internal or Submersible Filtration, please see Internal Aquarium Filter Basics.


Includes MediaIncludes Bio Media, Carbon Pads, and Sponges
Flow Rate155 gph
Power Cord Length5.5 ft.
Warranty3 year warranty for non replaceable parts
UL ListedNo
Max Tank Size40 gal.
Length3.5 in.
Width3 in.
Height10.5 in.
Internal Id

Ratings & Reviews

3 reviews

  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

This is an excellant filter


I bought this for my turtle tank. It keeps the tank clean and free of debris, it is super quiet. I'm even considering getting one of these for my other tank for my fish. The warer is crystal clear and the odors are gone. Highly reccommend this to anyone with turtles.



The Fluval U3 is well made and easy to change the filter media. It tilts and pulls off its stand for easy removal. My only complaint is that the company does not give you enough of the white Biomax media pellets to fill the holding cartrige so you will have to purchase more on your own.

works well


Very simple to install. and no noise. Adds great water movement to the tank.
<br>Would buy again...