When drinking water is of questionable quality, use Potable Aqua Germicidal Tablets to make most water bacteriologically suitable for drinking. Confidently trusted by those who have to know - militaries, relief organizations, and campers everywhere. Safe, Drinkable water. Anytime. Anywhere. Bullet Items: An iodine based tablet that works on all bacteriologically impure water One bottle contains 50 tablets and will purify 25 to 50 quarts of warter, depending on source of water.