A cationic polymeric flocculant formulated to coagulate and floc fine suspended solids from spa and hot tub water. These solids, after the addition of Clear Blue, will be filtered out of the spa or collect on the bottom for removal. Helps clear cloudy water in spas and hot tubs. Use on start-up and once a week. Routine weekly dose is 2 oz. per 500 gallons of water.