Two Little Fishies Kalkwasser Mix (calcium hydroxide) (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
Mix into top-off water as limewater (saturated is the standard) and add slowly via ATO, drip or reactor to match daily Ca/alk demand; adjust strength by testing Ca, alk and pH.
Cautions
• Raises pH sharply; dose slowly into flow
• Keep separate from Mg/trace additives
• Limewater loses potency in contact with air
Sources
Julian Sprung's Reef Formula Kalkwasser Mix. TLF's page gives no dosing numbers (only that it replenishes Ca, maintains alk/pH, precipitates phosphate and aids skimming); label directions not retrieved. Effects derived from Ca(OH)2 chemistry, identical to any pure calcium hydroxide.