IODINE+ Supplement promotes pink colors in corals and is part of Red Sea's range of major, minor & trace element complexes providing the needs of corals. I2 | Br2 | F2, this unique supplement contains iodine, bromine & fluorine, which serve as both antioxidants & oxidative agents in coral soft tissue. Red Sea's IODINE+ helps prevent coral bleaching and plays a role in producing the pink pigments of coral soft tissue. Iodine & bromine are closely related to the pink chromo-protein pocciloporin. For ultimate coral color, also use Red Sea's NO3: PO4– X.