Red Sea Reef Colors B is a Potassium and Boron Supplement and is part of the Red Sea Coral Coloration Program. Red Sea Reef Colors B is a Potassium complex that promotes the Red colours in corals. Reef Colors B Supplement is part of the complete range of complementary major, minor and trace element complexes which together provide the needs of corals. Reef Colors B contains Potassium and Boron that are associated with many biological processes, one of them being the production of the red pigments in the soft tissue of corals.