K.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-causing bacteria, chemicals also kill other bacteria that suppress odor. Chemicals can cause the odor problems you're trying to solve! Enzymes stimulate the breakdown of waste already in the tank, but are not effective against odor, and are diluted by new waste as it is added. Features: * Kills odors in marine and RV holding tanks * Bio-Active * Non-Toxic * Non-Caustic