Tetra BF Biofoam S Filter
Tetra BF Biofoam S Filter for TetraTec EX600/700 and other external filters. Efficient biological and mechanical filtration. High surface area to support growth of beneficial bacteria. Reliably removes medium sized particles from aquarium water. Rinse in lukewarm water prior to use. Clean as necessary in a bowl of aquarium water. To maintain biological activity do not wash under tap water. Suitable for most external filters (ensure foams fit neatly into media basket)