Red Sea Magnesium (Reef Foundation C) powder (mixed solution, per ml)
magnesium
Manufacturer data
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What one dose does
PARAMETER
1 ml / 100 L
Magnesium
+1 ppm
To raise magnesium by 50 ppm in 100 L: 50 ml.
How it’s used
Same Foundation routine as the liquid. Add powder directly or make stock solution (1 kg in RO water to 1.7 L) which doses like the retail liquid.
Cautions
• Max daily rise: Ca 20 ppm, Alk 0.5 meq/L (1.4 dKH), Mg 10 ppm; spread larger corrections over several days
• Add in order Magnesium -> KH/Alkalinity -> Calcium+, allowing 10 minutes between each
• Add to the sump or a high-flow area, away from fish and corals
• If a level is above target, pause until it is consumed, then resume at the amended dose
Part of Reef Foundation ABC
Sources
maxDose derived: 10 ppm / 1.34 = 7.5 g per 100 L/day. Minor internal inconsistency: 0.6 g of powder per ml of stock x 1.34 ppm/g = 0.8 ppm, but the manual labels the stock 1 ml = 1 ppm.