Finally found a feed store in area that carries and will order Diatomaceous Earth. All the threads about this product and I couldn't find anyone who carries FOOD GRADE? Not sure if others in area having same issue? Orderd on line but was rather expensive. Got it here www.thecritterbarn.com for $19 for a 50lb bag !! Save a lot on shipping charges. Check it out if you are near its location in MAINE.(NH border)