ARM™ EXTRA LARGE

A reactor medium with a high magnesium content. ARM™ Extra Coarse is always a complete reactor medium containing not only calcium and carbonate, but also essential trace elements.

Contains:
416,000 ppm calcium, 577,000 ppm carbonate, 3,300 ppm strontium, 1,400 ppm magnesium, 56 ppm potassium.
Approximately 70 pounds per cubic foot.
1 gal (00531), 50 lb (00551)