CaribSea ARM Reactor Media Extra Coarse 1gal 3.78L
A high magnesium reactor media. ARMTM Extra Coarse is still a complete reactor media containing not only calcium and carbonate, but essential trace elements as well.
ARMTM Extra Coarse contains:
275200 ppm Calcium
590000 ppm Carbonate
2200 ppm Strontium
2000 ppm Magnesium