Reef Advantage Magnesium
300G
Add 1 teaspoon (approximately 5 grams) per 80 liters of water, twice a week. Dissolve in fresh water first before adding to the aquarium.Recommended concentration: Maintain calcium ion concentration at 1250-1350 ppm.Precautions: Do not mix directly with carbonate products; add at least 30 minutes apart or on different days.