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Contains important magnesium
Sera marin COMPONENT 6 - magnesium contains important magnesium. Magnesium and calcium must be in a balanced ratio for optimal growth of corals and other lower animals. The magnesium content should not be lower than 1300 mg/liter. You can conveniently determine the magnesium content using the Sera Mg-test (see instructions for the test)
Dosage: Use the cap as a measuring cup. If you have increased the calcium content with Sera marin COMPONENT 1 and 2, add one scoop of Sera marin COMPONENT 6 - magnesium per 100 liters of water.