Calcium reactors have evolved into several types that require different media sizes. Because of this we now offer ARM Coarse for rapid upflow type reactors that have become so popular. This coarse grade of ARM will prevent the clogging and upkeep associated with fine media and these reactors.

Contains:
416000 ppm Calcium, 577000 ppm Carbonate, 3300 ppm Strontium, 1400 ppm Magnesium, 56 ppm Potassium.
About 70 pounds per cubic foot