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What one dose does
PARAMETER
1 g / 100 L
Calcium
+3.4413 ppm
To raise calcium by 20 ppm in 100 L: 5.8 g.
How it’s used
Dissolve 2 g (about 1 tsp) in 8 oz (236 ml) RO water per 20 US gal and add in high flow once a day until target is reached; then dose to measured consumption (0.011 g per gal per ppm).
Cautions
• Gets very hot when dissolved: mix outside the tank, wear gloves
• Hygroscopic: keep tightly closed
• Do not add at the same time as alkalinity products
Sources
Anhydrous calcium chloride (heat on dissolving, label says contains calcium chloride). Size from retailer listings.