Lenzyme enzyme-bacteria product can be used as a septic biological maintainer, drain cleaner and sewage-treating agent in the home and in industrial, commercial and municipal installations. It may also be used in formulations specifically designed for a given condition or application. Various formulas have been developed for use in drains, septic tanks and cesspools, and for industrial and commercial application. It is approved by the USDA for use in sewage and/or drainlines of establishments operating under the federal meat, poultry and egg products inspection program. Each production batch is certified to be free of salmonella and E. coli. 800/223-3083; www.lenzyme.com.