Red Sea Fish Pharm ARE22063 Coral Colors Iron/Trace Supplement-C for Aquarium, 500ml Coral colors Fe and trace supplement-C is part of the complete range of complementary major, minor and trace element complexes Contains iron, manganese and other trace elements that are associated with many biological processes Iron and complementary trace element complex that promote the green colors in corals Dose according to a measured uptake of iron using iron pro test kit Available in 500-ml bottle