High rate trickling filter media!  For rapid aeration of domestic or industrial wastes containing biodegradable organics.  Designed to meet requirements of modern high-rate trickling filtration.  One of the most efficient configurations ever designed for mass transfer operations.  Provides greatly desired high specific surface area.  Media serves as substrate on which a slime of microorganisms grow.  Lightweight, rigid packing.  Easily installed – random dumped.  Minimum operating expense. Must call for freight quote.