Southside Farm Store - 1534 E 38th St, Minneapolis, MN It's the food grade DE from Perma-Guard. They carry 2lb bags for garden use but will special order a 50lb bag if you ask. The price may vary depending on how much they order but mine came out to $39.50 with tax. They also carry chicken feed and grit in bulk or by the 50lb bag. Note: I don't work for them, just happy to have finally found DE in my area.