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