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 means the lowest phosphate content (less than 1/10th of 1ppm)

• 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.