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What one dose does
PARAMETER
1 ml / 100 L
Iron
+51.2 ppb
To raise iron by 1 ppb in 100 L: 0.02 ml.
How it’s used
Beginner: 2.5 ml (1/2 cap) per 160 L (40 US gal) twice a week. Natural seawater 0.003-0.01 mg/L; macroalgae systems often 0.05-0.1 mg/L. Formula: ml = 0.195 x liters x mg/L rise.
Cautions
• Easy to overshoot natural levels; test with a low-range iron kit.