If I'm not planning to use it for feed, is either one ok to use? I can't find plain DE anywhere and don't want to pay so much for shipping. I *might* be able to find stall dry locally. Anyone know of what chain stores carry it? We don't have TSC but we have a couple of Ace Farm Stores and also Rural King. eta: we do have a TSC an hour away so I could go there if necessary.