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What one dose does
PARAMETER
1 g / 100 L
Calcium
+3.61 ppm
To raise calcium by 20 ppm in 100 L: 5.5 g.
How it’s used
Dissolve in RO/DI and add slowly to high flow to correct low calcium in tanks with adequate-to-high alkalinity; ESV recommends B-Ionic or kalkwasser for long-term maintenance.
Cautions
• Adds no alkalinity; monitor alk
• Excessive Ca can precipitate CaCO3 and depress alk
• Long-term use adds chloride and skews ionic balance
• Anhydrous CaCl2 dissolves exothermically
Sources
No ESV dosing figure or mixing recipe found; potency derived purely from the stated anhydrous grade. Possibly discontinued (not on BRS's current ESV listing).