Review on 🐠 Premium JIH Aquarium Filter Media Sponge Foam: Coarse, Cut to Fit Biochemical Filter Bio Sponge Pad - Optimal Fish Tank Filtration by Crystal Carlson

I bought this filter media to replace the sponges in my Tetra 40 rear filter because the factory originals were flimsy and falling apart and I didn't need the plastic frame. . Also, the Tetra replacement frame/sponge is often out of stock and retails for around $5. It was cheaper in the long run because I can cut this sponge to fit a 6 filter frame in an aquarium and also use small offcuts in small Betta tanks as an extra medium. Very happy with the porosity. Slightly denser than tetra sponges so hopefully last longer.