Asian style Undergravel Filter Box

Plamski Shrimp farm

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The Asian style Undergravel Filter Box is a unique way to filter your shrimp tank. It works by pulling water slowly through the media to the bottom of the box and pushing it out the tube at the top.  This allows for a large amount of media to be used, and due to the water slowly passing through it ensure that the media or soil always stays oxygenated and that no dead spots occur.

Due to the lower resistance of the filter, it allows for a much higher flow rate when compared to a normal sponge filter. These filters have been tested to filter an average of 10-30gal. If given enough pressure and air, the filter can reach almost double the flow rate.

We offer 3 sizes of   Undergravel Filter Box:

  1. 4”x4:x4” Suitable for 5 Gal tank
  2. 75”x4.75”x4.75” for 10 Gal tank
  3. 8”x4”x4” for 20 Gal tank

A great advantage of the filter is that it requires minimal maintenance over its life span. It’s recommended to only clean the filter when you restart your tank, or if your soil buffering capability has run out (Normally 1-2 years).  Replacing them is as simple as removing the box from the tank, removing the content, giving it a rinse and then filling it back up. If you have a backup filter that has been pre-cycled you can instantly replace it in your tank to keep on running.

The Undergravel Filter Box is a box you are free to experiment and optimize as you wish. You can add any media or soil to it in any quantities. If you are looking to buffer your water and are worried less about biological filtration, you can fill the entire box with buffering substrate. This will still provide biological filtration, as a large amount of bacteria lives on your substrate.

This filter kit includes:

  • Filter box
  • Airline tubing.
  • 1 Airstone.
  • Filter plate
  • Higher adjustable tubing (Maximum height 15”)
  • Coarse foam pad

Kindly note that this kit does not include buffering soil.


Due to it being handmade please expect some minor differences in the finish of it.


26 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Miguel on Jul 13th 2024

    I recently bought this under gravel filter box from plamski and so far it has been a great product. Very happy so far. I plan on buying more in the future

  • 5
    Awesome product

    Posted by Jonathan on Jan 23rd 2024

    I originally tried to DIY this product, and it was a pain. Expensive, difficult, and didn’t end well trying to do it yourself. I highly recommend this product over DIY It worked great out of the box Looks perfect, 10/10

  • 5
    Great U.G. Filters!

    Posted by Rocco Damico on Jan 16th 2024

    I ordered 3 sizes of these filters and I love them. They are made well and are strong. They're also easy to set up, easy to use, and they provide good water flow through the substrate. Perfect!

  • 5
    Very good

    Posted by Nguyen Quang on Dec 23rd 2023

    Very good

  • 5
    Asian style under gravel filter

    Posted by Alan Blanchard on Oct 30th 2023

    Does an excellent job at filtering the water and keeping the pH at a low level. Very well constructed.

  • 5
    Works Great!

    Posted by Scott on Oct 7th 2023

    This is the third UGF box I have bought from Plamski. All work terrific!

  • 5

    Posted by petr on Jul 1st 2023

    Perfect filter for shrimp tank

  • 5

    Posted by Marty on Apr 12th 2023

    I have two of these now and they work great for caridina.

  • 5
    UGF Box

    Posted by Anton on Apr 10th 2023

    Very nice and sturdy UGF box.