Check with some of the oil field people around Canton. I paid $8 for some 100 lb. bags but I knew the truck driver and he got me a deal(I guess). I also talked to a guy who bought it in bulk but don't know the price.

Texas Sodium Bentonite Company in Comanche has distributors statewide. You can call them at (915) 885-2339 for a dealer near you.

You might also ask for specific instructions on how to use it. I've tried it several times on small silted in stock watering tanks that we cleaned out and hit sand. There must be a way to do it right but I've never been successful.