Absolutely, MBBR media can be customized for specific wastewater treatment applications. The customization might involve alterations to the size, shape, density, and surface area of the media to match the requirements of a particular wastewater stream. The design can be tailored to optimize biofilm growth and activity for targeted contaminants and operational conditions, such as flow rates and concentrations of pollutants. This customization allows for more effective treatment of complex or highly variable wastewater compositions.