I have a pond of about 1&1/3 ac in size 8ft deep. Upon suggestion of LSU extension office I put in 1600 lbs of powdered gypsum yesterday(17th). How long does it normally take to make a difference? We applied by pouring out of a bucket and bag into the prop wash of a trolling motor. It looks like it mixed very well using this method. We simply crossed the pond in a zig-zag fashion to spread out. Thanks.
