This product is used for control of mollusks, including zebra mussels and clams, in nonpotable industrial water systems.
It is effective as an acute toxicant for systems that do not have continuous water flow (i.e., fire protection systems, standby facilities), but the preferred use is in closed delivery systems with daily dosage at sublethal levels.
Sites of application do not include freshwater cooling tower systems.
It may be applied to maintain clean systems or to treat systems that are already fouled. The system to be treated should first be cleaned of adult zebra mussels and then treated.
Treatment is usually on an intermittent basis, with normal frequency being once per day, or as needed to maintain control. Intermittent injection of low concentrations has been shown to have the potential for reducing molluscicide quantities while maintaining effectiveness (Giamberini, Czembor, and Pihan 1994).