Prevents drinking water becoming tainted by the taste of the tanks. Non-toxic. Allows the water to retain its taste and fresh smell for more than a year. Non-toxic Keeps water tasting and smelling fresh for up to 1 year Prevents water from picking up taste or smell from water lines or tank One level teaspoon treats 100 gallons of water. Dissolve desired amount of Aqua Water Conditioner in small amount of warm water. Add this mixture to water to be treated. Do not exceed recommended dosage. Use as often as needed. To clean and deodorize fresh water tanks that have developed foul smells or taste after long periods of storage, use AQUA Water Tank & System Flush.