Potable Aqua Water Purification Tablets 50 count - The most trusted name in water purification products, Potable Aqua is used by various militaries and relief organizations around the world. Potable Aqua products provide time-tested, simple-to-use water treatment options for campers, backpackers and other outdoor enthusiasts. Makes questionable water bacteriologically suitable to drink Easy to use-ready in just 30 minutes 50 tablets per bottle treats 25 quarts