CaribSea A.R.M. Calcium Reactor Media Coarse 1gal

ARM 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. ARM Extra Coarse contains: 275200 ppm Calcium, 590000 ppm Carbonate, 2200 ppm Strontium, and 2000 ppm Magnesium.