Custom Foam Filters for Aquariums

We will custom cut any of our foam sizes to meet your needs. Whether you want a foam filter/tank divider, pre-filter for a sump, a piece to fit your own homemade filter or a replacement foam for another manufacturer's filter, we'll cut it for you as long as it's a rectangular piece.  Our reticulated foam has much greater surface area than the Matala style filter sheets.

You can choose from:
15 PPI (blue) in 2", 3", 4" or 5" thick pieces
20 PPI in 3", 4" or 5" thick pieces
40 PPI in  3" or 4" thick pieces
Bio-Sponge in 4" thick pieces

Maximum length is 48", Maximum width is 29".

The cost is $0.045 per cubic inch plus $0.40 per piece.  For example, if you want a 12" x 10" piece that is 2" thick, the cost will be (L x W x thickness x .045 =  $10.80 plus $.40 for a total of $11.20. This piece would have a huge 240 cubic inches of filtering material for a very low price.

Tip: When measuring, it is usually better to err on the side of a bit too large. If the piece is too small, the gap will allow water to pass through unfiltered. A piece that is slightly too large, will compress to fit the space. We recommend adding at least 1/4" to the inside width, to make sure the foam fits tightly. We will be accurate to within +/- 1/8" on all cuts. If you need to cut a bit off a piece, a very sharp knife works well. Some find that an electric knife works the best. 

Select One: 15 PPI Blue 20 PPI 40 PPI Bio-Sponge

Enter Size in inches (L x W x D):


  Quantity

$ Enter Cost per piece (L x W x D x .045 + .40)

$10.00 minimum on custom pieces.

We will notify you of shipping charges on your custom order for your approval before shipping your items.

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The videos below show an example of a couple configurations for custom foam filters.

Angels Plus Foam Filters are the result of decades of experimentation and extensive testing.  We use the finest waterproof reticulated foam available for bio filtration.  Not all foams are suitable for nitrifying bacteria growth.  Some are actually toxic while others just provide a poor environment for growth of these bacteria cultures.

Foam Options:  Our 20 PPI foam is a good all-around choice. Pore size is large enough to not clog readily, yet it still offers a very high surface area for generous nitrifying bacteria growth. The 15 PPI is also a great general purpose foam and handles large fish better than our other foams. The 15 PPI foam resists clogging best of all. They are very popular as whole-tank filters. The 40 PPI option is great for fry tanks or small species. If the fish waste is small, then these will remain unclogged for a long time. The pore size is also small enough to prevent fry from entering a pore and getting trapped. As the fish get larger and they produce more waste, the larger pore options may be more suitable.

There are many foam filters on the market, but they are unlikely to be able to handle the kind of fish density seen in this video.  The below 40 gallon tank has over 100 large angelfish in it and it filtered by only three of our 4" air-driven 20 PPI sponge filters.

To learn more about aquarium filtration click here!