We bought our house about three years ago it has a natural (man-madeI assume)pond, about 3/4 acre. When it is full it is 6-7 feet deep, currently about 3-4'. It is fead by both ground water & a drainage culvert from the other side of the street (runoff from farm fields). Each summer we have had a major problem with weeds (currently duckweed). It is so thick it looks like a lawn. We have had two fish die off this season, the first was about 2 dozen bluegills, now I have 6-12 20" carp floating with maggots all over them (It looks great). I had the soil & water people come out, I have excess nutrients was their conclusion. Their suggestion was to increase the buffer around pond (from 6' to 25', I don't fertilize curently with in 25' of pond only spray weeds, so that's a joke) & aeration, (all the aerators I have seen though are big money upfront & to run, & needs 8' or more). My firm belief is the nutrients are coming in durring spring from farm fields across street, I don't know how to stop it. I am at a loss, seriously considering starting to fill it in. I am going to call the DEC first to see if they have any solutions. Any ideas???