Magnesium plays an important role in many biological processes, such as the construction of the soccer carbonate skeletons of hard corals. Due to its unique chemical characteristics, it has a significant impact on the buffer capacity of sea water, and also prevents excessive precipitation of calcium carbonate on the aquarium equipment. An adequate level of magnesium is crucial to maintain an appropriate calcium and alkalinity balance in barrier aquariums. Magnesium levels should be analyzed regularly, along with other critical importance water parameters, such as alkalinity and calcium. The concentration of magnesium in natural sea water is between 1260 and 1500 mg / l (ppm). The test contains enough reagent to make about 55-60 measurements in that range.

