Raising Mg

[TTT]

Originally Posted by Frenchie

Is it odd for it to be so low? I had been using instant ocean salt, but have recently switched to reef crystals. The tank is only 6 months old.

I too have had problems increasing Mg and Ca levels. I have been using liquid supplements but that has become expensive. I have been using Reef Crystals but have not been impressed. I have tested new salt water mixes at 1.026 sg (using refractometer) and got readings of 360 ppm Ca and 980 ppm Mg using two different brand test kits. I will be switching to a new salt.