"Kalkwasswer" is the German term for limewater, a saturated solution of calcium hydroxide in water. Used to replenish calcium and maintain alkalinity, benefiting corals, clams, and calcareous algae that build skeletons, shells, and crusts from calcium carbonate. Kalkwasswer - it is to be mixed with freshwater to make a saturated solution of calcium hydroxide for maintaining calcium level and a high pH in reef aquariums. It also precipitates phosphate and enhances protein skimming. Full instruction provided.
