Fluval AquaPlus Freshwater and Saltwater Aquarium Water Conditioner Treatment instantly makes tap water safe for fish by neutralizing chlorine, chloramine, and heavy metals. It contains natural herbal extracts (like Valerian root) that reduce fish stress and protect slime coat, helping fish acclimate during water changes or transport. Use AquaPlus whenever setting up a new tank or performing water changes to ensure your aquarium water is gentle and non-toxic to aquatic life. Available in Multiple Sizes