Replace old or worn filter media to maintain superior filtration. Fluval FX Series Bio-Foam plays an important role by providing outstanding mechanical and biological filtration to the multistage Fluval FX series canister filters. Intricate pore structures offer a large surface area for the growth of beneficial nitrifying bacteria essential for natural ammonia and nitrite removal. Also traps small debris and particles to provide additional mechanical filtration.

Suitable for use with Fluval FX4 High Performance Canister Filter and FX6 High Performance Canister Filter. Rinse every three months and replace every six months for best performance. 2 pack.

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Maintenance
Important
To ensure optimal and proper functioning of your Fluval FX External Filter, regular maintenance is required. Failure to do so may result in the failure of the filter and will invalidate your warranty. Additionally, regular cleaning and maintenance will greatly reduce or completely prevent faults and reduction in performance. Please refer to the maintenance schedule below.

*Important: If you have not done regular maintenance of the inside of the canister as recommended by the maintenance frequency chart, some particles may get flushed back into the aquarium.

About Fluval
What Makes Fluval So Trusted?
Fluval is a world leader in quality aquatic products. Fish-hobbyists everywhere have depended on Fluval's reliable technology and great design for over 35 years.

Fluval has built its reputation by developing technically advanced, innovative products that are easy to use, durable, and convenient. Without Fluval innovations the world's aquariums would be far less inspiring.

Fluval's pioneering spirit and commitment to technology and design are also reflected in its wide product range, from the technically advanced Fluval G Series Filters to stylish yet practical aquariums, including Fluval Edge, Chi, Profile, and Studio.