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ARM™ EXTRA COARSE
A high magnesium reactor media. ARM™ Extra Coarse is still a complete reactor media containing not only calcium and carbonate, but essential trace elements as well.
416000 ppm Calcium, 577000 ppm Carbonate, 3300 ppm Strontium, 1400 ppm Magnesium, 56 ppm Potassium.
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