Bowtiebubba,

Greetings from SE Missouri. I made a post on the thread entitled "Vendors for Gypsum" that had some information about where to purchase, and some trade names to search on. I would have to believe that you could find one of these brands available in the St. Louis area. I added powdered Gypsum a couple months ago with good results to a 1 acre pond. I have not posted my results to the "Calculating Gypsum Amount" thread yet because I wanted to make sure the clarity held. I am also going to try Meadowlark's suggestion for liming too and hope that both methods combined will result in a long term solution to the muddy water problem I had. If you really get in a bind, there is more gypsum than you would ever need about 30 minutes from my location. However, we're about as far apart North and South as you can get and still be in Missouri. Good Luck.

2ac, 1ac, .5ac, .3ac,