Finest Filters Compatible with Biorb Aquarium Filter Upgrade Fish Tank Foam & Gravel Converter

The Finest-Filters large compatible with biorb foam filter upgrade is compatible with all biorb aquarium models. This product is intended to be used in addition to the usual filter service kit. This is an additional filter foam which sits under the gravel in the aquarium and provides extra filtration In addition to the additional biological filtration supplied by this filter foam, using this foam also allows you to choose a gravel of your choice rather than the large ceramic pebbles. We have run these in a marine tank with coral gravel, a planted tank pea gravel and a cold water keeping the ceramic media Simply sleeve the foam over the outside of the filter housing prior to adding ceramic media or a gravel of your choice. To clean we suggest using your gravel gleaner and push it into the foam to extract any trapped particles.