Hey Bill, the 25 bluegill that were stocked were roughly 4-8 inches in length. I would like to be able to harvest this fall or at the latest next spring. We have a 100 foot 3/4 inch seine and the pond is equipped with a bottom drain that can empty the entire pond if needed. We used a laser and put a riser pipe on it that will drain it down to the exact size that we thought would be most effective for seining. I haven't tested the pond for alkalinity, nitrates, phosphates, etc. but have a kit to test for alkalinity. Don't own a secchi disk at the moment.