FAQ: Is it possible to overdose Seachem Reef Advantage Magnesium™?

It certainly is!  An overdose of Reef Advantage Magnesium™ can result in a sudden and stressful shift in magnesium levels, which can stress both fish and corals.  If magnesium levels are still incorrect despite repeated additions of a supplement like Reef Advantage Magnesium™, it is likely that a supplement like Kalkwasser is preventing your magnesium from rising.