Jacobi AquaSorb CX-MCA is a 12 x 40 catalytic, high activity granular activated carbon manufactured by steam activation of select coconut shell charcoal. The catalytic activity of this activated carbon makes it highly effective for the removal of chloramines and hydrogen sulfide from potable water.https://www.aquascience.net/products/filtration-treatment-systems/jacobi-carbon-water-filtration-taste-odor-hydrogen-sulfide-removal