Aquatabs are the world s #1 water purification tablets. The effervescent tablets are effective against Giardia cysts bacteria and viruses. Aquatabs are used in emergency situations and also in households that do not have access to safe drinking water. Aquatabs are used by the world s major aid agencies NGOs relief organizations peace keeping and defense forces and Ministries of Health. Aquatabs are also used for water treatment by international tourists in the water systems of RV/camper vans and for marine usage such as in yachts/boats. They treat 10 billion liters annually.