Here it is... The World Famous "Water Bobble" for Pools & Spas! When properly placed in the skimmer, the Water Bobble removes contaminants right off the surface, stopping the bacteria-laden dead skin, body oil, makeup, from going round & round within your circulatory system. The majority of the dead skin will collect on the Zorbie, rather than congeal on your filter. "Water Bobbles" last 30-90 days or until they settle low in the water, depending on bather loads.