FluvalBiofoam2pk304/5/6And404/5/6

Fluval 306/406 And 307/407 Bio-Foam+ - 2 Pack Exclusively Designed For Fluval Aquarium Canister Filters Fluval Bio-Foam Performs Exceptional Mechanical And Biological Filtration. Bio-Foam's Dense Structure Is Very Effective At Trapping Small Particles That Are Not Captured In The First Stage Of Foam Filtration. in Addition Its Intricate Network Of Pores Provides A Large Surface Area That Encourages The Growth Of Helpful Nitrifying Bacteria Which Is Crucial For Efficient Biological Filtration And Goes A Long Way In Creating Clear And Healthy Water For Fish And Plants To Thrive. key Features : For Fluval Filter Models: 304 305 306 404 405 406 2-Pack