Reef Strontium™ is intended to restore and maintain strontium to levels found in natural seawater without affecting pH. Strontium is utilized in the same manner as calcium and holds a similar importance in maintaining a vigorous level of growth.

Strontium occurs in natural seawater at a concentration of about 8 to 10 mg/L. It is chemically very similar to calcium, and many organisms incorporate it in their skeletons along with calcium. Its addition to reef aquariums aids the growth of corals, coralline algae and other organisms that lay down a calcereous skeleton or shell, including tridacnid clams.

BEGINNER: Use 8 g (1 level teaspoon*) per 150 L (40 gallons*) twice a week. May be added directly to aquarium. ADVANCED: Check strontium level, then follow addition regimen above until strontium is adjusted to 8–12 mg/L. Each 8 g/150 L will raise strontium by about 2 mg/L. Amount or frequency can be adjusted as needed. Thereafter, use as required to maintain strontium. EXPERT: After determining the strontium depletion rate, set up a continuous drip system. Use the following formula to determine how much to add to your top-off water: m=vs/30 (m=grams to add to top off water, v=volume of tank in liters, s=amount to raise strontium in mg/L). For example, if you want to raise strontium by 6 mg/L in a 200 liter aquarium, then you would add (200x6)/30=40 g into the top-off water. [For reference: 1 gallon* = 3.8 liters]. Notes: Use the Reef Status: Strontium™ to check strontium levels.

DO NOT OVERDOSE: Excess strontium may enhance the loss of carbonate alkalinity. Do not directly mix with any carbonate supplement. Best if strontium & carbonate additives are added on alternate days or at least 30 minutes apart.