BioMax Filter Backpack for Fluval AquaClear AC70/AC110, 2 pcs

Premium Biological Filter Media The complex pore system provides a large surface area for the prosperous growth of beneficial bacteria. Promotes the reduction of ammonia and nitrite. Allows even water distribution, extending contact time for additional biological filtration. For best results, replace every 3 months.For use in freshwater and saltwater aquariums.