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Seachem Reef Advantage Calcium test kits Use the Salifert test kit Size:Large 10kg Use the Salifert test kit to check the magnesium level in your marine aquarium water What is the dosage for Seachem Gold Basics it does not have a caustic pH and will not deplete magnesium Dissolve in at least 250 mL (1 cup) of freshwater
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