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Iodine is an essential element and is vital for coral development in closed reef tank environments. However, it is rapidly consumed by invertebrates and eliminated by the skimmer, the active carbon, the filter and coralline algae. IODI+ supplies the hard corals in your aquarium with the iodine they need to grow and for coloration. It also helps them to adapt to lighting variations and neutralizes the excess oxygen produced by Zooxanthellae under excessive lighting and therefore combats coral bleaching. IODI+ is also particularly recommended for Xenia, Anthelia, Clavularia, and corallimorphs.