Mineral accretion devices utilize a well known process called electrolysis, which is also used for other applications such as plating metals, removing rust, creating hydrogen batteries, and more. In this process, low voltage, direct current is applied to two pieces of metal that are submerged in water. At one end of the circuit, called the Anode, electrons flow from the wire into the water and causes H2O to break-up and oxygen to form. The water surrounding this area becomes quite acidic, and thus the anodes are kept small and suspended in the water. At the other end of the circuit, knowns as the Cathode, electrons flow back from the water into the metal, causing H2O to break up and release hydrogen bubbles into the water. At the Cathode, the surrounding water becomes quite alkaline, and in these conditions calcium and other minerals are no longer soluble in the water and precipitate out to accumulate onto the metal. For coral restoration, corals and other organisms are planted on the cathode, which is usually made of steel rebar and can be shaped into any design imaginable.