Oasis Water Purification Tablets incorporate Troclosene sodium (NaDCC) to safely and efficiently disinfect drinking water. By killing microorganisms in water, the Oasis Water Purification Tablets will aid in preventing diarrhoea, dysentery, cholera and other water-borne diseases. OASIS 1000 - 1 tablet per 200 liters of water - 200 tabs per tub - 6 tubs per carton. Price 200 tablets / US$ 38.00 OASIS 3000 - 1 tablet per 600 liters of water - 100 tabs per tub - 6 tubs per carton Price 100 tablets / US$ 50.00