I have a pond that is just over 1 yr old and have muddy looking water, the clarity is really bad, 3-5 inches. I took a 5 gallon bucket of water and added some small drywall pieces to it and clarity definitely got better over the course of several days. I did a couple of jar test using Alum and that cleared up in no time. The control jar never really got any better even after sitting for weeks. Since we still have some areas that grass is not growing in to well and the seasonal creeks flow into the pond, we decided to use gypsum rock for helping with the clarity. I need about 3-4 tons of gypsum rock but the min order is 22 tons delivered. At $15 a ton, heck bring it on. The delivery is more expensive.

So my question is, can you use to much gypsum? I know it's pH neutral but I can't seem to find anything about using to much, downside of using to much, etc.
I was thinking of placing the extra gypsum rock in the season creek beds to possibly help in heavy rains. Using it as riprap in some locations until we have better grass coverage etc.
I realize that this will take weeks to make the clarity better but I figure it's best to get it started now and by late Feb I might be ready for the first bloom. I also read that using rock can last 4-5 yrs.