Harris Ground Fresh 100% Diatomaceous Earth is a natural product. It is OMRI listed with the Organic Minerals Research Institute and meets organic use standards. Use to protect your garden plants. Use in animal feed, and multiple other uses. Easy to use puffer bottle. Natural product for organic use. Use to protect your garden plants. Use in animal feed and multiple other uses. OMRI listed with the Organic Minerals Research Institute. 8 oz. puffer bottle is easy to use.