CAUTION! The Post Office has been very late with delivery on most orders during the Covid 19 Crisis, so UPS (Standard Shpping) is the more reliable option!

Sponge Filters
Slate base 15ppi Sponge filter
Internal-weight sponge filter
Internal-weight 30ppi sponge filter
30ppi Mag Sponge Filter
30ppi Slate Bottom Sponge Filter
50ppi Slate Bottom Sponge Filter
15ppi Mag Cube Filter
PPI Comparison

Filter - Cube Sponge Filter

Regular price $4.50
Shipping calculated at checkout.

Made from our Pro-Level Reticulated Foam, specifically suited for colonizing nitrifying bacteria at the highest levels in aquariums.

The current lift-tube color is a dark green.  The Slate bottom filters have a round slate attached to the bottom. 

As you can see from the list below, a 4.25" cube contains a lot more foam than a 4" one - over 20% more!

  • 3" cube filter has a volume of 27 cubic inches
  • 3.25" cube filter has a volume of 34 cubic inches
  • 4" cube filter has a volume of 64 cubic inches
  • 4.25" cube filter has a volume of 77 cubic inches
  • 5" cube filter has a volume of 125 cubic inches

Sponge Filter Details:  Please read here

Customer Reviews

Based on 1 review
100%
(1)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
C
C.S.C.
Great filters

The foam you use on these is the good stuff. These are the best bio-filters for the money. I'll be getting more!

We agree! Thanks