For water storage, why not consider chorine bleach, it is cheap and readily available. Just be sure to buy the unscented variety. Many of the bottles even have the appropriate amount of bleach to add for water disinfection or go to the American Red Cross, FEMA or Cholox brand web sites for additional information. Pete


http://www.redcross.org/services/disaster/beprepared/foodwtr.html

http://www.fema.gov/library/dizandemer.shtm#supplies

http://www.clorox.com/health/disaster/disaster5.html