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Stable water chemistry – reliably increase the carbonate hardness for stabilising the pH value in your aquarium and contribute to a reduction of the risk of acid fall. Promotes growth – with a special formula, the Dupla Marin KH+ Liquid supports the growth of stone corals, shells, lime tube worms and lime red algae in your aquarium. Contains potassium – the potassium component also supports the water quality of your aquarium – an effective prevention against pH fluctuations. Easy to use: the Dupla Marin KH+ liquid can be easily used via dosing pumps and allows precise adjustment of the carbonate hardness in your seawater quarium. Expertise – As a family-run company in the 3rd generation, we can rely on 75 years of experience and support you as a reliable and innovative partner in terraristics.