Perma Guard Diatomaceous Earth Fossil Shell Flour Food Grade 2 lb (10/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.
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