Perma GuardPerma Guard Diatomaceous Earth Fossil Shell Flour Food Grade 10 lb (2/Cs)

Perma-Guard™ OMRI certified Diatomaceous Earth is the purest food grade fresh water amorphous silica diatomaceous earth available. Perma-Guard™ is derived from fossilized diatom remains. It is approved as an anti-caking agent in feed not to exceed 2% of rations fed and meets FDA regulations to be considered Food Grade.