Kalkwasser (calcium hydroxide)
kalkwasser
Ca(OH)₂
Manufacturer data
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What one dose does
PARAMETER
1 g / 100 L
Alkalinity
+0.7569 dKH
Calcium
+5.4092 ppm
To raise alkalinity by 1 dKH in 100 L: 1.3 g.
How it’s used
Dosed as saturated limewater through top-off water, slowly, often at night when pH is lowest. Calcium and alkalinity are delivered in the same balance corals use them.
Cautions
• Raises pH sharply; never add a large volume at once.
• Saturated limewater carries roughly 0.8 g Ca per liter at most, which caps how much one day of evaporation can deliver.
• Absorbs CO₂ from air and loses strength; keep the reservoir covered.
pH effect: raises.
Sources
Molar mass 74.09 g/mol.
stoichiometry (IUPAC atomic weights)