Caribsea Calcium reactor media

ARM Coarse Reactor Media contains calcium, carbonate, and trace elements.

Nearly 50x the Strontium of other brands (7390ppm)

Precision grading allows for maximum carbon dioxide penetration

No gastropod shells mean the lowest phosphate content (less than 1/10th of 1ppm)

The highest solubility of any reactor media (metastable at 8.2)

One of the most trusted media for calcium reactors in the industry. The media is a complete solution which includes both calcium and carbonate as well as essential trace elements.