To control mollusks in recirculating or once-through cooling water and industrial systems using continuous or intermittent application, add BULAB 6002 at dosage rates of 0.2 to 2.2 fluid ounces of BULAB 6002 per 1,000 gallons of water (15.6 ml to 172 ml to 10,000 L), or 2 to 20 ppm product. Addition should be made continuously or intermittently to the intake water. Continuous addition is required for noticeably fouled systems.
Intermittent feeding is used to maintain control.
Mollusk fouling has been prevented by concentrations as low as 2 ppm.
Initial concentrations of 2 to 5 mg L-1 can be used up to 21 days. The long-term limit is 0.5 mg L-1.
The following tabulation summarizies laboratory studies showing efficacies of this product and the relationship of exposure time to concentration. Martin, Mackie, and Baker (1993a) showed that toxicity was temperature dependent.
