DIATOMACEOUS EARTH 50 LB BAG

Diatomaceous Earth packaged under Perma-Guard's FOSSIL SHELL FLOUR label comes from a highly pure freshwater deposit of the diatom Aulacoseira from a deposit created in the Miocene epoch. Why is this diatom so unique? Its shell is made of amorphous silica. Its shape and hardness are critical to how it works. Its hardness keeps it from dissolving in liquid. The holes along the diatom's wall allow it to absorb moisture, hence its use as an anti-caking agent. Darker-colored Diatomaceous Earth often contains an excess of a particular mineral, such as iron, or a high percentage of clay.