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To raise calcium by 20 ppm in 100 L: 10.9 g.
Reagent/ACS or food grade. Rarely sold to hobbyists; deliquescent crystals whose water content drifts.
• Only ~18.3% Ca: using dihydrate numbers with hexahydrate under-doses by ~33%.
• Deliquescent: may already have absorbed extra water; verify stock with a Ca test.
pH effect: neutral.
Reagent/ACS or food grade. Rarely sold to hobbyists; deliquescent crystals whose water content drifts.
pubchem.ncbi.nlm.nih.gov/