Eheim Noir Filter Foam Universal 2400/3400 (X2) Large

Mechanical and biological filtration cartridges. Dirt particles are retained by the porous foam. At the same time, the material provides a large colonization surface for cleaning bacteria. Shortly after start-up, the cartridges provide not only mechanical cleaning, but also biological degradation of harmful substances. Cartridges can be reused several times. For cleaning, they simply need to be rinsed and wrung out, so that the bacterial cultures are not completely destroyed. The foam traps dirt particles mechanically. Bacteria colonize the pores. Can be reused several times.