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What one dose does
PARAMETER
1 g / 100 L
Alkalinity
+0.4206 dKH
To raise alkalinity by 1 dKH in 100 L: 2.4 g.
How it’s used
Check pH and alkalinity first. 5 g (1 level tsp) per 150 L (40 US gal) dissolved in >=250 ml fresh water raises pH ~0.1. Typically needed biweekly to semiweekly. Do not exceed 6 meq/L alkalinity.
Cautions
• Do not exceed 6 meq/L alkalinity.
• Heavy cloudiness or failure to reach pH 8.2 at 6 meq/L means ionic imbalance; restore ~3:1 Mg:Ca or water change.
• Do not mix directly with Ca/Mg/Sr supplements.
Sources
Carbonate/bicarbonate blend (pK ~8.6) aimed at raising pH to 8.3; Seachem recommends Reef Builder or Reef Carbonate when pH is not the issue. No explicit daily max other than the 6 meq/L alkalinity ceiling.