Fossil Shell Flour (feed additive)

  • Horses
  • Cows
  • Goat
  • Chicken

We are changing our look!

Perma-Guard is making the change to stand-up pouches with the bright new label that you have noticed recently on our 1 lb jars and 3 lb jugs. Our new pouches are resealable, keeping  your Diatomaceous Earth safe from environmental contamination.

  • Convenience
  • Easier to open than a pillow bag
  • Recloseable maintain freshness
  • Easier to store

All Diatomaceous Earth is not the same.

Diatomaceous Earth packaged under our Fossil Shell Flour® label comes from an extremely pure fresh water deposit of fossilized Aulacoseira diatoms created in the Miocene epoch. Why is this diatom so special? Its shell is made of amorphous silica. Its shape and hardness in the fossilized form are important to how it works. Its hardness keeps it from dissolving in liquid. The diatom’s tubular shape and holes along the diatom's wall allow it to absorb moisture, hence its use as an anti-caking agent.  The tubular shape of the diatom gives it more surface area than other shaped diatoms. This means it has a greater absorptive capacity with the holes that open to the center and improved mixing and flow of animal feed. Fossil Shell Flour® does not swell, does not absorb nutrients and poses no long term hazard when used as an anti-caking agent in your animal's feed.  Fossil Shell Flour ® consists of 89% (and often more) Silicon Dioxide plus numerous trace minerals. Fossil Shell Flour® is almost pure white when dry and appears light tan when wet. Other diatomaceous earth deposits often contains an excess of a particular mineral such as iron or a high percentage of clay giving it a darker color or a reddish tint. 

Formation of Freshwater Diatomaceous Earth

Fresh water vs. salt water Diatomaceous Earth

Fresh water deposits like ours have a consistent diatom presence. Their fossilized shells have maintained their tubular shape. This shape and strength of the fossil shell is critical to its effectiveness. Our deposit has 89 - 92 percent amorphous silica content. This deposit is also more consistent in its purity. A fresh water deposit is confined to the runoff water of its surrounding environment. A fresh water deposit in the mountains, such as ours, formed when snow was pure and its run off provided the water source these diatoms lived in. Salt water deposits contain a mix of types of diatoms of different shapes. Their fossilized shells are fragile and break easily. This renders them ineffective for our purposes. The salt water deposits are less predictable in their sediments due to their open environment.

What's the difference between amorphous and crystalline silica?

Amorphous (click here for definition) silica is silica in its natural occurring state. It is a trace mineral every mammal on the planet needs to live. Diatoms are found in all water sources and are the main food for aquatic life.  Diatomaceous earth becomes crystalline when it is exposed to extreme heat by commercial manufacturing means and in minute amounts through naturally occurring extreme heat such as volcanic activity. The type of diatomaceous earth used in swimming pool and other, filtration systems is crystalline silica that has been heated to make it crystalline. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable. Perma-Guard Diatomaceous Earth contains less than one half of 1% of crystalline silica and is considered GRAS (generally regarded as safe). OSHA considers safe levels of crystalline silica as 1% or less. Naturally occurring crystalline silica is found in all water sources and the dirt blowing in the air during dust storms.  Diatomaceous Earth is not sand (click here for article).

Common Uses for Fossil Shell Flour®

Fossil Shell Flour® is beneficial to add to bird seed and animal feed, such as sweet feed, that contain sticky substances like molasses or used and stored in areas of high humidity that cause the feed to clump. Fossil Shell Flour® used as an anti-caking agent improves the flow of sticky feeds. Fossil Shell Flour® mixed in the feed, coats each particle making it difficult for the particles to stick together.  Its ability to absorb excess moisture helps prevent feed from molding in high humidity conditions.  

Fossil Shell Flour® anti-caking agent is to be mixed at a rate not to exceed 2% of the dry weight of the ration. This means, when mixing, in every one hundred pounds of feed, 2 pounds of feed is replaced by 2 pounds of Fossil Shell Flour®. All regulated products are sold by the information on the label. 

Perma-Guard Fossil Shell Flour® is OMRI listed, Certified Kosher and is accepted for use in the Organic Certification process.


View product label: FOSSIL SHELL FLOUR®


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Items 1-9 of 10