ESV Calcium Hydroxide (Kalkwasser Powder) (dry powder, per gram)
kalkwasser
Partly derived
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What one dose does
PARAMETER
1 g / 100 L
Calcium
+5.41 ppm
Alkalinity
+0.757 dKH
To raise calcium by 20 ppm in 100 L: 3.7 g.
How it’s used
Dissolve into top-off water to make limewater (saturated is the standard) and drip slowly via ATO or reactor to match daily Ca/alk demand; adjust strength by testing Ca, alk and pH.
Cautions
• Raises pH sharply; dose slowly into flow and watch for pH spikes
• Do not mix with Mg/trace supplements in the same container (precipitation)
• Limewater loses potency in contact with air (CO2)
Sources
No ESV-specific dosing numbers; all effects derived from Ca(OH)2 stoichiometry and solubility (see effect notes).