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Reef Kalkwasser™ is pure calcium hydroxide with unsurpassed purity and solubility characteristics. It is used to prepare solutions that maintain the natural concentration of calcium in seawater. Calcium is regulated directly and carbonate alkalinity indirectly. However, its capacity to perform these functions depends on the evaporation rate and CO2 content. If these two factors are not sufficient, you can provide additional calcium with Reef Advantage Calcium™, Reef Complete™ or Reef Calcium™, and carbonate alkalinity with Reef Builder™ or Reef Carbonate™ (do not mix directly with Kalkwasser solution). Cut: 500 grams.
Seachem Reef Kalkwasser 500 g