Fossil Shell Flour
Diatomaceous earth is a gardener’s best friend. With Perma Guard Fossil Shell Flour, you can add this natural element from one of only four food grade deposits in the USA. Safe and effective — contains less than one half of 1% crystalline silica and is “generally regarded as safe.”
• Food grade — OMRI certified for use with grain, seed, livestock operations and organic growing operations
• 89% silicon dioxide plus 28 trace minerals
• Extremely pure grade from fresh water sources
• White to grey in color
Available in 50-pound bags
As an anti-caking agent, mix in animal feeds in an amount not to exceed 2% by weight of total ration.