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A Diatom is a one-celled plant that live in quantities that they out weigh the total of all land plants combined. Diatoms that the minerals out of water and build a protective shell. As they die, the shells drift to the bottom of the ocean or lakes beds and form layers (some hundreds of feet thick) called Diatomaceous Earth.
Ground freshwater Diatomaceous Earth
Diatom shells are not food, they are not digested, but pass through the digestive tract to destroy parasites
Pure white 100% food grade
OMRI Listed (Organic Materials Review Institute)
10 pound bag