•Calcium: Calcium is the main building block for clams and should be present in the water at levels of at least 280 mg/L for growth to occur. More rapid, natural growth is seen when calcium is in the range of 400-480 mg/L.
•Strontium: Strontium is incorporated in the shell along with calcium and should also be provided for optimum growth.
•Iodine: The addition of iodine to the aquarium will also enhance growth and color in giant clams.
•Magnesium: Magnesium aids in maintaining proper calcium levels and in the formation of skeletal material in clams
•Nitrate: They require some nitrogen for proper growth. Nitrate can be added if levels are extremely low, but be careful as nitrates should never exceed 2 mg/L.