Aqua Pure Concentrate 50ML Aqua Pure Concentrate 50ML is a water purification solution that is used to purify water for drinking, cleaning and other purposes. It contains a blend of natural ingredients such as silver ions, zinc ions, and other mineral ions that are designed to get rid of bacteria, viruses, and other contaminants in water. The concentrate is easy to use and can be added to any type of water to make it safe to drink. It is also safe to use in aquariums to keep fish healthy.