The ATI ICP Element Fluorine is a liquid supplement designed specifically for reef aquariums to maintain optimal levels of fluorine, an essential trace element for coral growth and health. This product allows hobbyists to accurately dose their aquarium with precise measurements, ensuring that the beneficial effects of fluorine are achieved without causing harm through over-dosing. Each 1000 mL bottle contains 2,000 mg of fluorine, providing a concentrated solution that can be easily dosed to raise the current value by 0.2 mg/L per 10 mL added to every 100 liters of water. This makes it an indispensable tool for reef tank owners looking to maintain ideal conditions for their corals and other invertebrates.