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Dymax Bio Sphere is an exceptionally porous material crafted to serve as a substrate for bio-filtration, specifically targeting the removal of ammonia and nitrite (nitrification) while also helping to lower nitrate levels (denitrification) in freshwater, marine, and reef aquariums. This product fosters the growth of nitrifying bacteria on its outer layer and denitrifying bacteria within its core, delivering outstanding effectiveness in eliminating harmful substances and inhibiting algae proliferation.