API Marine Calcium 473ml - Premium Reef Aquarium Supplement for Coral Growth & Water Hardness | Ideal for Saltwater Tanks, Coral Reefs & Marine Ecosystems

Calcium is vital for the proper health, growth, and coloration of your fish. 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.

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.