I have a technical question about DE. I know that pool DE is different and toxic. What I'm wondering is what the difference is between the stuff you buy at the hardware store to put around your house and "food grade" DE? I am having no luck finding food grade DE locally and before I spend a lot of money shipping food grade DE I would like to know why it is different. Does anybody know? Also, at 22 weeks we got our first eggs (2) today. Just wanted to share because we were so excited. My 6 year old said its like magic.