Filtermedia Siporax Prof. 50L 15

The porous material provides as much surface area for bacteria as approximately 34 liters of standard ceramic filter material. It offers an excellent habitat for beneficial bacteria that break down toxic nitrite and nitrate. Pond filters and larger aquariums. The tubes are 15mm in diameter. Sera Siporax is a completely biological filter material for all internal and external filtration systems and for pond filters.