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.
 
Red Sea’s  KH/ALKALINITY  is a complex of Carbonate and other buffers present in seawater that maintain proper Alkalinity and pH, and is part of Red Sea’s complete Reef Care program.

Concentration:

Liquid supplement: Liquid supplement: 1ml will raise the Mg level of 100 liters (25 gal) by 1ppm.