Tetra Aquarium Filter Foam For Easycrystal Biofoam 250/300, Black

High quality product Biological filtering: filter sponge with a very large surface area conducive to colonisation of useful bacteria grid with frame to facilitate the replacement of biofoam filter foam Biological filtration: filter sponge with a lot of surface area for the colonisation of friendly bacteria grid frame used to facilitate the replacement of the filter foam biofoam