What is DE? I live in the city & the pet /feed store has limited stuff

[LeghornGuy]

What is the formal name for DE?
Is there a website I can order DE?
Please send me information on DE.
I let my chickens free range twice a week.
I separated some of my hens that have mites.
I am not sure if they have worms.
I have added vitamins to their water supply.
Is DE for Worms and mites?
Is it a feed or a powder?
Please let me know
The Leghorn guy

 

[Poison Ivy]

If you email wally at perma guard he can tell you if someone in your area carries it. Here is the website with all the info for you.
http://www.perma-guard.com/

 

[Nyna]

This is the website I got mine from. It's the cheapest I've found.
http://www.internet-grocer.net/diatome.htm