Add sufficient ACTI-BROM 1338 and oxidize with either gas chlorine or sodium hypochlorite solution to achieve a reisdual bromine level of 0.5 to 5 ppm or as needed to maintain control of the system.
Periodically apply on a continuous basis for 1 to 3 weeks at 0.1 to 0.5 ppm free residual oxidant to eradicate juvenile and adult mussels (McCarthy and Trulear 1992). This concentration is based on a bromine to chlorine ratio (molar basis) of 1:1.
Treatment of adults with a total residual oxidant level of 0.1 ppm indicated that 18-day continuous contact gave up to 60 percent mortality, and 30-day contact 90 to 100 percent mortality (Sawyko 1994).