Diatomaceous Earth Grades ?
OK I'm going to buy some.
Are there really different grades like Food, Pest, Pool?
Or do the sellers for pest control just want us to think there's a difference?
And, does the fineness of razor sharp dust really matter that much?
There is a guy north of here that sells it raw to horse and chicken ranchers. (Them chicken saddles are small.)
If you know, please share.