Red Sea Reef Foundation C is a Magnesium complex for balanced formation of Coral SkeletonsReef Colours C, Light Metals.Promotes Colour : GreenContains : Iron, Manganese, Chrome, Cupper, Nickel, Aluminium, Zinc, and cobalt.Seperated from other elements to prevent chemical interactions.Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons. All of these elements need to be available in balanced proportions for coral health and growth.Reef foundation C contains blended salts of Magnesium and is part of Red Sea\'s complete Reef Care program.For best results dose according to a measure uptake of Magnesium and in conjunction with Reef Foundation A and BRed Sea research has shown a direct relationship between Calcium uptake and the 31 individual elements of the Reef Colour supplements.Can also be used as part of the Stage 4 - Reef Colours in the Red Sea Reef Care Program.The Reef Colours Stage 4 provides a complete solution for testing and dosing all Reef Colour Supplements based on a measured calcium uptake. Use with Reef Colours A, B, C, D and Reef Colours Pro Test Kit for accurate testing and dosing This products is part of the new Red Sea unique Reef Care Program (RCP). The Red Sea reef care program is the result of over 5 years research from Red Sea scientists resulting in unparralleled understanding of the requirements of coral aquariums. The Red Sea Reef Care Program provides a holistic solution to maintaining a flourishing coral reef aquarium.It even allows beginners to achieve stunning sps aquariums safely.