ESV Magnesium additive

Magnesium, when used with calcium and alkalinity supplements, plays an important role in stablilizing pH in your reef tank. B-Ionic Magnesium is an easy to use liquid magnesium supplement which  will not disrupt the ionic balance of closed marine tank. Add 1.5 mL per gallon of aquarium capacity per day until a target level of 1200-1350 ppm magnesium is reached.