The Mutag Ball Swirl Mbbr Media is a high-performance biofilm carrier for MBBR applications in waste water treatment. The outstanding quality of the material as well as the high-tech structure of the surface and the fine pore system,are only a few of the many benefits you can gain from this media.Engineered Pore Structure.4000M2 surface area for 1M3.Lower Media Volumes.Lower Tank Volumes.Lower Tank Surface Area.Lower Minimum Mixing Energy.