Replacing liquid cooling water treatment chemicals with dry products was desirable due to safety, storage, and shipping costs. A detailed evaluation was performed to determine costs and performance. This case history identifies the results and costs of this "new" solid product application. Key words: Cooling Water System; Product Evaluation; Scale, Corrosion, Mierobiocides, lnhibitors, Solid Products, Corrosion Coupons, Microbio Monitoring, Water Quality, Chemical Feed System