Tablets can be used to treat contaminated water. Kills bacteria and viruses. If the presence of Bilharzia (Schistosomiasis) is suspected; use 2 tablets or leave water for 45 minutes. If water is extremely cold (below 50C) leave for 30 minutes. An innovative water treatment solution to bring clean drinking water to families; communities; and disaster relief or drinking access programs. Combined flocculation and disinfectant tablets for treating water at the household level. Prevents common waterborne diseases including Cholera; Typhoid; Dysentery; Polio and Hepatitis. Harmful if swallowed. Keep in dry container. Solution may bleach fabrics. 20 tablets treat 400lt of water.