Kalkwasser became the method of choice in the United States for most of the last decade, surpassing calcium chloride and buffer as the preferred calcium supplementation method. Kalkwasser has been the method of choice for European aquarists for the past twenty years, clearly suggesting the effectiveness of this method.
The Continuum advantage.
Reef•Basis Kalkwasser is a high quality calcium hydroxide, the original German limewater method of adding calcium, providing essential calcium for increased growth rates in corals, coraline algae, crustaceans and many other marine organisms. It contains no acetate, EDTA, gluconates, polygluconates or other unnecessary organics to pollute your aquarium.
Use in aquarium keeping.
Kalkwasser is primarily designed for maintenance and does not work rapidly, so you should first use our Reef•Basis Calcium if you have severely depleted calcium levels and need to raise them rapidly. Proper control of calcium level is imperative for the health and growth of corals and many other invertebrates. Continuum recommends that you maintain a calcium level of between 410 and 450 mg/L (ppm), an alkalinity level of 7 to 11 dKH (2.5 to 4 meq/L), and a magnesium level of 1250 to 1350 mg/L (ppm). Note: Aquarists keeping SPS corals should consider keeping alkalinity at 7 to no more than 9 dKH (2.5 to 3.21 meq/L).