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API / Fish

API Marine Magnesium Supplement 16 oz

$1498

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API Marine Magnesium raises and restores magnesium levels to maintain a thriving reef aquarium. The magnesium concentration of a reef aquarium should be between 1250-1450 ppm mg/L. The magnesium level gradually drops in reef aquariums as it is utilized. So, it is important to test magnesium levels weekly and add magnesium accordingly.