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the skeletal material of hard corals and the skeletal needles of soft/leather corals
Reducing General Hardness
Irritating to eyes and skin
Do not shake off excess water
RED SEA Reef Foundation C (Mg) 1kg calcium media the skeletal material of hardCalcium, magnesium, strontium and carbonate are the basic foundation elements of coral skeletons. All of these elements need to be available in balanced proportions for positive coral health and growth. Reef Foundation C contains blended salts of magnesium and is part of Red Sea's complete Reef Care Program. Concentration Liquid supplement: 1ml will raise the Mg level of 100 liters (25gal) by 1ppm.