Not sure of the age of the pond. The previous owner was there for 8 years and the pond was present when he purchased the property. He was not into fishing so he could not give me much help with details nor did he do any kind of stocking except for the 3 grass carp. Is it true that grass carp eat less plants as they age? I think that the quickest and best way to get a better idea of the population is to have the lake shocked. I have been told that it would be better to do this in the fall as you would be able to find out how this years spawn went. Do you agree? Again, thank you for your help!