Aquamira" is a water treatment system which employs a binary concept to ensure maximum effectiveness. Combining just 7 drops of each colorless liquid in the included mixing cup will treat one quart of water. Since there is no iodine used in this system, there are none of the iodine-related health issues or residual iodine taste in the treated water. Aquamira" releases oxygen, one of the best disinfectants available, in a highly active form to kill bacteria. It kills bacteria, virus, and protozoa. Its by-products are oxygen, water, and one part per million table salt (sodium chloride). The by-products of Aquamira" are considered to be safer for use than those of chlorine, iodine and other halogen based products. Each unit will treat up to 30 gallons (120 liters) of water. Four-year shelf life.