Designed specifically for the Fluval FX4, FX5 and FX6 high performance canister filters, Bio-Foam+ pulls double duty as both an effective mechanical and biological media.

Key Features:

• Mechanical/Biological filter media
• Large porous surface area supports expansive beneficial (nitrifying) bacteria growth
• Effectively captures small particles and debris, particularly those that are not retained by the first stage of foam filtration
• Custom fit for FX Series filters to increase filtration efficiency
• Helps create a healthy aquarium and ideal water conditions
• Rinse every 3 months
• Replace every 6 months
• Convenient 2-pack format
• For use in freshwater and saltwater