Zanyzap 3 Foam Filter Blocks for Fluval SPEC Aquarium

These foam blocks are custom manufactured for the Fluval Spec Aquarium. They are sometimes referred to as part #A1376. These foam blocks effectively remove large particles and debris from your aquarium for effective mechanical filtration. Although the primary purpose is mechanical filtration, biological activity will eventually occur within its pore structure. It is the perfect size to allow efficient water flow with less clogging.