Well I'm talking about water clarity. My pond is about 1acre ave.depth 5ft. 4years old. No erosion problems, no catfish, no carp, added Lime and Alum in past. I read an article at some piont that recommended a bottom soil sample. I can't remember where and what to exactly test for, I just know that a bottom soil sample was recommended in reference to water clarity issues. Is there anyone that can direct me into what I,m looking for in the soil sample that would relate to water clarity?