Potassium carbonate
alkalinity
K2CO3
Manufacturer data
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What one dose does
PARAMETER
1 g / 100 L
Alkalinity
+0.4057 dKH
Potassium
+5.658 ppm
To raise alkalinity by 1 dKH in 100 L: 2.5 g.
How it’s used
Food grade anhydrous (E501i); very hygroscopic.
Cautions
• Adds 39.1 ppm K per 1 meq/L alkalinity - same potassium-overdose risk as KHCO3; partial blend only.
• Hygroscopic: weigh quickly, store sealed; dissolution is mildly exothermic and strongly alkaline.
pH effect: raises (like sodium carbonate).
Sources
Food grade anhydrous (E501i); very hygroscopic.
pubchem.ncbi.nlm.nih.gov/