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!
Best AND easiest filters ever…!!! Perfect density…. PLUS They always stay down, just squeeze in a bucket and put back in when dirty, DONE…!!!!!
Angels Plus has the best sponge filters on the market.
The only sponge I’ll use.
These are the best sponge filter out there. others don't come close. I will order more.
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
