The AerGrid high-efficiency coarse bubble floor grid system from Aeration Technologies (Aertec) suits multiple applications, including high solids suspension. It gives designers flexibility to put aeration where it is needed, including in dry and wet environments. Efficiency improves as airflow increases using full-floor or tapered coverage. Basic elements include diffuser laterals with engineered orifices, attached to the bottom of the tank or basin with a yoke support assembly fixed to the floor or ballasted. The maintenance-free system includes a non-clogging, self-draining design, a wide airflow operating range and corrosion-free HDPE and stainless steel construction. 978/475-6385; www.aertec.com.