Red Sea Calcium+ (Reef Foundation A, Ca/Sr/Ba) liquid
calcium
Manufacturer data
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What one dose does
PARAMETER
1 ml / 100 L
Calcium
+2 ppm
To raise calcium by 20 ppm in 100 L: 10 ml.
Maker’s daily maximum: 10 ml per 100 L (10 ml for 100 L).
How it’s used
Bring Ca/Alk/Mg to target, then run 4 days with no dosing at stable salinity; the amount needed to restore levels divided by 4 is the daily dose. Retest weekly and adjust. Dose Mg, then Alk, then Ca, 10 min apart, into the sump.
Cautions
• Max daily rise: Ca 20 ppm, Alk 0.5 meq/L (1.4 dKH), Mg 10 ppm; spread larger corrections over several days
• Add in order Magnesium -> KH/Alkalinity -> Calcium+, allowing 10 minutes between each
• Add to the sump or a high-flow area, away from fish and corals
• If a level is above target, pause until it is consumed, then resume at the amended dose
Part of Reef Foundation ABC
Sources
Potency from manufacturer page; maxDose derived from Red Sea's 20 ppm/day Ca limit (20/2 = 10 ml per 100 L/day). Older labels: 'Reef Foundation A (Ca/Sr)'. Target Ca by tank type (manual): mixed reef 450, SPS dominant 430, SPS frag 465, ULNS 410, fish-only 370 ppm.