It's actually no more effective than Clorox. According to a paper published by the World Health Organization on May 8th, 1986, that describes the use of chlorine dioxide, sodium hypochlorite, and sodium hypochlorate as disinfectants for drinking water, chlorine dioxide rapidly breaks down into chlorite when added to water. Chlorite is exactly
the same active ingredient as in Clorox bleach. Save your money. Use unscented Clorox, just like your Airstream owner's manual, the World Health Organization, FEMA, and the EPA all recommend for sanitizing fresh water supplies.