Fluval 306/307 Bio Foam Value Pack, Replacement Aquarium Filter Media

Premium biological and mechanical filtration media designed specifically for the Fluval 306, 307 canister filters, Bio-Foam Max: 2-in-1 biological and mechanical filtration media with rippled surface pattern offers 30% more area for increased debris and waste capture, Bio-Foam: mechanical filtration media precision cut (no gaps) to prevent debris bypass and complex foam structure maintains consistent water flow, Bio-Foam+: mechanical and biological filtration media with large porous surface that supports expansive beneficial biological activity, 6-month supply for use in freshwater and saltwater aquariums