Description of Katadyn Micropur Purification Tablets - 20 Tablets Micropur water purifier tablets are for the emergency disinfection of drinking water. When used as directed, te tablets make contaminated water suitable for drinking. Features: Each tablet treats 1 liter of water Effective against Viruses, bacteria, Giardia and Cryptosporidium Improves the taste and odor of treated water Easy-to-use tablets Meets EPA microbiological water purifier test standards