Review on 🐠 Tetra 25992 Whisper 10 Bio Foam Grid Replacement Kit for Effective Aquarium Filter Maintenance by Sandra Saksena

I bought this product thinking it would be a replacement for the Bio Bag filter cartridge. No, that is not so. This is a complement to the Bio Bag which can be placed behind the Bio Bag and provides additional mechanical/biological filtration. If that's what you want, then great! I'm just sending mine back because it's not what I expected and I don't want it. FYI, there is only one foam net in purchase. The picture shows front and back views, which many people think are two nets in the package. There is only one here.