Check the listing for details. API Tap Water Conditioner 4 size to choose from. Condition: New. Listed at 15.99 USD. API Tap Water Conditioner is a super-strength water conditioner that instantly removes chlorine and detoxifies heavy metals in tap water. Its highly concentrated formula is perfect for use when setting up a new aquarium or adding water. Removes chlorine and chloramines and detoxifies heavy metalsMakes new tap water safe for fishSuper strength, highly concentrated formula Safe for all aquatic life. Heavy metals, such as copper, lead, and zinc, can be found in most tap water supplies. These metals are toxic to tropical fish; treating the aquarium when adding tap water reduces the risk of fish illness or death from these elements. Directions: To remove chlorine and detoxify heavy metals: Add 1 teaspoon (5 ml) for each 100 gallons (380 L) of aquarium water. To detoxify chloramines: Add 1 teaspoon (5 ml) for each 30 gallons (114 L) of aquarium water.