FAQ: Is it possible to overdose Seachem Reef Calcium™?

It certainly is!  An overdose of Reef Calcium™ can result in a sudden and stressful shift in calcium levels, which can throw off your other water parameters.  If calcium levels are still incorrect despite repeated additions of a supplement like Reef Calcium™, we would recommend swapping to an ionic supplement like Reef Advantage Calcium™ or Reef Complete®.  If you continue to have trouble shifting your calcium levels, it may be that other water parameters are outside of the ideal range for reef aquaria. We recommend testing your magnesium and alkalinity to ensure these parameters are within the ideal range for a reef aquarium.