Perma-Guard DE distributors - link
I am fairly satisfied at this point that Perma-guard is the best, and that many retailers are simply re-packaging the perma guard product and marking it up for resale in smaller batches.
The following link provides a US map with distributors who sell the stuff by the pallet or 50lb bag. I think a fifty pound bags runs in the ball park of 30 bucks !!!!
http://www.perma-guard.com/distributors
also here at amazon for twice the money (includes shipping) still a bargain at about 1 dollar per pound:
http://www.amazon.com/Perma-Guard-Diatomaceous-Earth-Food-Grade/dp/B002XMTXX8...
I have a distributor within about 40 miles of me. I'm thinking of getting about 200lbs of this stuff.
Update: day 4 , DE has INCREASED elimination for me thus far, and decreased appetite. It's lunch time, I'm not that hungry, and I haven't had breakfast or lunch or anything at all. except 1stp DE mixed in water!!! This kind of diet normally doesn't fly with me. I feel good today. After saline enema, you might say well that's why elimation is good b/c of the enema, but I'm a 4-7x/ week enema user for the last year + and I can say for sure, so far, that DE has increased the effectiveness of the saline enema.