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To raise strontium by 1 ppm in 100 L: 10.4 ml.
Beginner: 5 ml per 80 L (20 US gal) twice a week. Target 8-12 mg/L. Drip formula: ml = 0.1 x liters x mg/L rise.
• Excess strontium can deplete alkalinity.
• Do not mix directly with carbonate supplements.
Strontium gluconate (10,000 mg/L). No daily maximum stated.
seachem.com/reef-strontium.php