This water conditioner is a concentrated liquid formula designed to make ordinary tap water safe for aquarium fish. It works on contact to remove chlorine, break the chloramine bond and bind heavy metals such as copper, lead and zinc so they no longer pose a risk to aquatic life. The product is intended for use whenever water is added to a tank, including initial setup, routine partial water changes and topping off for evaporation. It is suitable for both freshwater and saltwater systems and is added directly to tap water or to the aquarium itself. Bottles typically include a dosing cap to help measure the correct amount for a given tank volume. No mixing equipment beyond the bottle and cap is required, and the treated water can be used with fish once it has been thoroughly combined.