BEGINNER: Use 6 g (1 level teaspoon) per 150 L (40 gallons) twice a week. May be added directly to aquarium. For precise dosing, use the Seachem Digital Spoon Scale™.
ADVANCED: Check strontium level, then follow addition regimen above until strontium is adjusted to 8–12 mg/L. Each 6 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 L aquarium, then you would add (200x6)/30=40 g into the top-off water. [For reference: 1 gallon = 3.8 liters]. Use the Reef Status™: Strontium test kit 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.
Reef Advantage Strontium™ Dosing Tables
Standard Dose
Adds approx. 2 mg/L strontium
| Water Volume | 1 qt / 1 L | 1 gal / 4 L | 10 gal / 40 L | 50 gal / 200 L |
| RA Strontium™ Dose (g) | 0.038 g | 0.15 g | 1.5 g | 7.5 g |
| RA Strontium™ Dose (tsp) | 1/120 tsp | 1/40 tsp | 1/4 tsp | 1 1/4 tsp |
Formula
Want a different result? Here's how to calculate it:
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Correct dose in grams =
Your tank volume (gal) x the amount you want to raise your strontium (mg/L) x 0.075
Do not increase your calcium by more than 2 mg/L in a single day
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Correct dose in teaspoons =
Your tank volume (gal) x the amount you want to raise your strontium (mg/L) x 0.0125
Do not increase your calcium by more than 2 mg/L in a single day
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