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To raise magnesium by 50 ppm in 100 L: 50.7 g.
Paired with magnesium chloride in a DIY magnesium mix so sulfate stays near seawater ratio. Plain, unscented Epsom salt.
• Dosing only sulfate for a big correction overloads sulfate; mix with chloride.
Molar mass 246.47 g/mol.
stoichiometry (IUPAC atomic weights)