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The coral sand is suitable for both freshwater and saltwater aquariums. Maifan stones consist of plagioclase feldspar; orthoclase feldspar; hornblende and biotite-various silicates and minerals. The micronutrients of these stones calcium; iron; zinc; magnesium; copper and selenium support the natural balance of the living organisms and by this means benefit to the density of the micronutrients in the water. 1 package unity is sufficient for about 1200 m? meters of water and should be replaced at regular intervals.
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