Raritan K.O. Kills Odors Bio-Active Treatment - GallonK. O. Kills Odors Bio Active Treatment Gallon K. O. utilizes live, odor killing bacteria that digest liquids, solid waste, and paper, totally emulsifying them so there's no need to add tissue digesters or other boosters to your system. The bacteria in K. O. neutralize the odor causing elements in waste, effectively converting the contents of your holding tank to an odor free product. Chemicals only mask the odor temporarily. Although they kill odor