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!
Made from our Pro-Level Reticulated Foam, specifically suited for colonizing nitrifying bacteria at the highest levels in your aquarium. These are fantastic bio filters.
The current lift-tube color is a dark green. The Slate bottom filters have a round slate attached to the bottom.