FluvalU BioMax

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  • Contains a complex pore system that provides large amounts of surface area for benficial bacteria to grow
  • Reduces and controls ammonia and nitrate
  • Perfect for freshwater and marine environments
  • 170 grams (6 oz) per pack

Fluval U BioMax Makes up the third and final stage of the filtration process - biological filtration. These ceramic beads are very porous, creating a lot of surface area for beneficial bacteria to grow. Fluval U BioMax is designed specificially for Fluval U2, U3 and U4 Underwater Filters.


  • Rinse thoroughly before use.
  • Replace every half of the BioMax every 6 months.
  • NEVER replace all of your BioMax at the same time. By replacing half at a time, you will maintain a healthy level of beneficial bacteria.
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