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What one dose does
PARAMETER
1 g / 100 L
Magnesium
+0.8 ppm
To raise magnesium by 50 ppm in 100 L: 62.5 g.
Maker’s daily maximum: 31.3 g per 100 L (31.3 g for 100 L).
How it’s used
Beginner: 5 g (1 level tsp) per 80 L (20 US gal) twice a week, dissolved in >=250 ml fresh water. Target 1,200-1,350 mg/L. Drip formula: grams = liters x mg/L rise / 80. Max 25 g per 80 L per day.
Cautions
• Excess magnesium can deplete alkalinity.
• Do not mix directly with carbonate supplements.
• Slight clumping is normal.
Sources
Blend of Mg chloride/sulfate (8% Mg); ammonia-free per Seachem.