Use 50% HYDRATED Lime per pound of Alum, and your pH will rise slightly when done.

Go to your local grocery store that sells McCormack seasonings and buy a small container of Alum (used in canning to keep things crisp).

It will take about 400-500 pounds of Alum and I'd suggest 300 pounds of Hydrated lime and the ending result will be a slight increase in pH.....do NOT use AG lime in place of Hydrated lime!!!!!

After the pond is clear, if you can, get about 5 tons per acre of pond and watershed spread with AG lime for long term (years) calcium and increased pH

You will need tons of gypsum.....way less cost with alum....never add alum alone!! Read the Clay kicks Clay Butt threads in the muddy water section you created this thread in.....it explains the proper ways to apply Alum and Hydrated lime....done wrong, or under dosed, it will not work!