Red Sea has developed a system with four different products to enhance the reds, pinks, purples/blues and greens of your corals. Coral Colors A has Iodine and Halogens including Bromine and Fluorine to promote the increased production of pink chromo-proteins. Coral Colors B contains Boron and Potassium related to red chromo-proteins. Coral Colors C primarily contains iron but also has trace elements of cobalt, manganese, aluminum, zinc, chrome, nickel and even trace elements of copper - which are related to the green and yellow chromo-proteins. Coral Colors D has 18 trace elements including silver, gold, vanadium and tungsten which will promote the blue and purple chromo-proteins. Disclaimer