The bag I bought of e-bay says the following word for word:
"100% Diatomaceous Earth - 10 lbs.
(Repackaged from Perma Guard 50 lb bag)
Fossil Shell Flour (Food Grade)
A Natural Product composed of ground diatomaceous earth (fresh water type)
Diatomaceous Earth is 84% silicon dioxide and has many uses. As an anti-caking agent mix into animal feed at the rate of 2% of the feed.
Packaged by: Custom Feed Services Corp. Norfolk, NE 68701
1-800-228-5836
www.earthworkshealth.com"
The ebay site is their ebay store from where I bought it.
The Perma Guard website says this about their fresh water fossil shell flour:
"Our deposit has 89 - 95 percent amorphous silica content."
There are two types of silica too (so not all silica is dangerous)
"Amorphous silica is silica in it's natural occurring state. It is a trace mineral every mammal on the planet needs to live. It becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing means. The type of diatomaceous earth used in swimming pool, and other, filtration systems is crystalline silica. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable."
"100% Diatomaceous Earth - 10 lbs.
(Repackaged from Perma Guard 50 lb bag)
Fossil Shell Flour (Food Grade)
A Natural Product composed of ground diatomaceous earth (fresh water type)
Diatomaceous Earth is 84% silicon dioxide and has many uses. As an anti-caking agent mix into animal feed at the rate of 2% of the feed.
Packaged by: Custom Feed Services Corp. Norfolk, NE 68701
1-800-228-5836
www.earthworkshealth.com"
The ebay site is their ebay store from where I bought it.
The Perma Guard website says this about their fresh water fossil shell flour:
"Our deposit has 89 - 95 percent amorphous silica content."
There are two types of silica too (so not all silica is dangerous)
"Amorphous silica is silica in it's natural occurring state. It is a trace mineral every mammal on the planet needs to live. It becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing means. The type of diatomaceous earth used in swimming pool, and other, filtration systems is crystalline silica. Crystalline silica is extremely dangerous when inhaled or ingested. It is not biodegradable."