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Info: Seachem Reef Advantage Strontium™ Dosing Instructions

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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