Dymax BioSphere Medium Size with Added with Preboitics, 1L, Black

Dymax Bio Sphere is a highly porous media designed to be a substrate to bio-filtration, specially remove ammonia and nitrite(nitrification) and reduce nitrate(denitrification) for freshwater, marine and reef aquariums. This product cultivates nitrifying bacteria on its outer sphere and denitrifying bacteria in the inner, thus provide exceptional efficiency to eliminate toxic substrate and prevent algae growth.