API® MARINE CALCIUM is a natural way to increase calcium levels in your reef aquarium, and should be used whenever calcium deficiency is present in your water, and should be used whenever calcium deficiency is present in your water. Use API MARINE CALCIUM when water tests show a calcium level below 400ppm mg L in your reef aquarium.
DIRECTIONS FOR USE:
Add 5 ml per 10 gallons of aquarium water.
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