Magnesium is an important element in helping aid the balance between calcium and alkalinity in saltwater. A proper magnesium level within 1290-1320ppm promotes calcification of corals.
17oz(500mL), 34oz(1000mL), 1gal(3800mL)
Once a week dose the same amount you dose per day of Part 1 or
MAX DOSAGE: 1ML PER GAL PER DAY