Reef Advantage Calcium is a non-caustic solution designed to maintain and restore calcium levels in saltwater aquariums to those found in natural seawater conditions. It helps support coral growth by providing essential elements such as magnesium and strontium, which are used at specific ratios for optimal health of marine life. This product is ideal for both beginner and advanced aquarists looking to ensure stable calcium levels without the risk of pH fluctuations or magnesium depletion often associated with other methods.