MicroFAST wastewater treatment systems from Bio-Microbics are recommended for individual, small community and commercial applications. With a small footprint, the system is integrated into a standard septic tank and does not require additional space. It is designed for low maintenance. Alternate modes of operation include recirculation of nitrified wastewater to the primary settling chamber for denitrification and (with the SFR feature) intermittent operation of the blower to reduce electricity usage and improve nitrogen performance in specific situations. 800/753-3278; www.biomicrobics.com.