not at the house now but it is definately less than 12 inches. Probably more like 6 inches. I defiantely need some gypsum to help clear it. I did the jar test and gypsum worked great. My only concern with the gypsum is the amount of silt that will settle to the bottom. Pond is only around 8' at the deepest. Pond is all excavated.
Here is another picture of the water taken at the same time. The water is green only in some areas.
