Aquatabs Water Purification Tablets 3.5 MG X 50 - 1 Tab/500ml-1L
They are effervescent tablets which kill micro- organisms in water to prevent cholera, typhoid, dysentery, and other water borne diseases. Each Tablet can treat 500 ml of cloudy suspect water(5PPM), or 1 litre of clear trusted water(2.5PPM).