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An agent for maintaining constant carbonate hardness level in reef aquariums. Accurate level of carbonate hardness is essential for stabilising pH levels. Sudden drop of carbonates concentration in the tank may entirely stop the nitrification process. Recommended level of KH in reef aquaria is 6,5-8,5 dKH. Dosage: dissolve 80 g of KH Buffer in 1000 ml RODI water.