Fluval BioMax rings have a complex porous design that ensures optimal contact time as water passes by for efficient biological filtration and beneficial bacteria growth.

• Biological filter media
• Greater capacity than most biological filter media
• Also helps reduce and control ammonia and nitrate
• For Fluval filter models: 106, 206, 306, 406, FX5, FX6, 105, 205, 305, 405, 104, 204, 304, 404
• For freshwater and marine aquariums