Red Sea Trace Colours A contains an Iodine and Halogen complex to help promote the pink colours in corals.
1 mL will raise the iodine level of 25 gallons (100 litres) by 0.03 ppm.
Through extensive research, Red Sea has identified 31 trace and minor elements that help make up the skeleton and soft tissue of corals. These elements are essential to the proper coloration of SPS corals. Red Sea has divided these elements into four groups which make up there Red Sea Trace Colours.