Red Sea Foundation Magnesium C is a premium concentrated magnesium supplement specially formulated to maintain and replenish magnesium levels in reef and marine aquariums. As part of the renowned Red Sea Foundation programme, Magnesium C works in conjunction with the complete Foundation series to maintain the ideal balance of magnesium, calcium, and alkalinity essential for healthy coral growth and a thriving reef environment. Magnesium is a critical element in reef aquariums, playing a vital role in stabilising alkalinity and calcium levels, supporting coral skeletal development, and promoting the growth of coralline algae and other reef invertebrates. Red Sea Foundation Magnesium C delivers a highly concentrated and pure source of magnesium that is easily absorbed and utilised by reef inhabitants, helping to prevent magnesium deficiency and support strong, healthy coral growth. Easy to dose and compatible with all Red Sea Foundation supplements, Magnesium C is a trusted and essential component of any reef aquarium maintenance routine, providing hobbyists with a reliable and effective solution for maintaining stable and optimal magnesium levels in their marine aquarium.