Device for the production of calcium, alkalinity, and micronutrients for marine aquariums

A calcium electrochemical reactor controlled by the electrolysis of water with direct current is proposed. In this reactor, marine aquarium water is circulated through a chamber containing calcium carbonate or additives such as ARM Aragonite Reactor Media in the form of solid particles, and an electrode polarized as an anode (positive pole). The applied current produces an electrochemical oxidation reaction of water that acidifies the solution in the chamber: 2 H₂O(aq) → O₂(g) + 4H⁺ + 4e⁻ The anode electrode used can be a titanium electrode coated with DSA-type metals or a stable carbon-based material, e.g., vitreous carbon. The acid generated promotes the dissolution of calcium carbonate and other solid species present in the reactor medium. The dissolution rate depends on the applied current, allowing the contribution to be regulated through the applied current. An additional electrode, a cathode, is necessary, placed in the aquarium itself and made of a non-corrosive material, such as carbon or a metal protected from corrosion by impressed current, like steel.