API Aqua Essential All-in-One Concentrated Water ConditionerAPI AQUA ESSENTIAL Water Conditioner makes tap water safe for fish by removing all harmful chemicals WORKS INSTANTLY: Highly concentrated aquarium treatment works instantly to remove harmful chemicals, making tap water safe for fish in freshwater and saltwater aquariums; Reduces the risk of fish loss when starting or maintaining a fish tank DECHLORINATOR: Removes chlorine, chloramines, heavy metals which are found in tap water and can cause gill and