Perma-Guard Fossil Shell Flour Diatomaceous Earth packaged under our FOSSIL SHELL FLOURĀ® label comes from an extremely pure fresh water deposit of the diatom Aulacoseira from a deposit created in the Miocene epoch. Why is this diatom so special? Its shell is made of amorphous silica. Perma-Guard Fossil Shell Flour Diatomaceous Earth’s shape and hardness are important 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.
Johnson Feed Co. is proud to serve Lewisville, Flower Mound, and southern Denton County. We specialize in animal nutrition and offer a wide variety of quality
feed and supplement brands to help keep the animals in your care healthy and well fed. We are happy to help with special orders. Stop by and shop for your lawn & garden products at
our store in Lewisville, Texas today!