Magnesium is present in natural sea water in a fairly high concentration (1350 - 1500 mg/L) and an essential element of chlorophyll which is necessary for photosynthesis. Without photosynthesis, plants, algae and coral would not be able to survive. Magnesium also helps to maintain the correct combination of calcium concentration and alkalinity as it slows down the formation of calcium carbonate; which can absorb many important trace elements within the aquarium. Carbonates and calcium are essential to all coral growth. If either becomes deficient, coral growth will cease: followed by a rapid decline in coral health.

Maintaining a correct magnesium concentration is therefore very important and is indirectly responsible for fast coral and calcareous algae growth by making it possible to maintain correct calcium and alkalinity figures. Magnesium is depleted by algae growth and also by the use of excessive Kalkwasser or by going far beyond natural calcium, alkalinity and pH values.

Dosage: 10 ml per 100 liter weekly. Test the magnesium level and adjust dosage as needed.

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