Fluval FX4/5/6 Filter Foam Block

• Provides effective mechanical filtration
• Custom fit to prevent debris bypass
• Ideal pore size allows efficient water flow and longer media lifespan
• Enhances the biological filtration process
• For use in freshwater or saltwater aquariums

Product Description Fluval Foam Filter Block for Fluval FX4/5/6 external aquarium filters, genuine Fluval media. Directions Fluval Foam Inserts capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration. These inserts also enhance biological filtration. For freshwater and marine environments. For filter models: FX5 Box Contains 3 Foams