The big O. Carlsen & Associates PORTABLE Ozone Generators.........Just add water.
Control the population of bad bugs in barrels, give a sanitary rinse to tanks, equipment, and other winemaking surfaces whenever you want. It's on wheels, it uses cold water (min. 5 GPM) and 110v AC. It's (over-) built at Carlsen in Healdsburg and might outlast you.