FITT-ee wastewater treatment systems from Bio-Microbics create an optimized treatment environment using submerged, fixed-film media for microbial growth with an energy-efficient aeration system. The engineered airlift provides constant aeration and mixing throughout the media for maximum biomass activities. This method of operation also allows the system to withstand periods of high and low input that upset most treatment systems, including those in nitrogen-sensitive areas or limitations with distance to groundwater and/or smaller dispersal field size requirements. Used for new construction or retrofit in existing tanks, the systems are engineered to fit most typical small-flow residential and commercial applications. 800/753-3278; www.biomicrobics.com.