You really need a lot of data points from fishing to evaluate the pond. Until then you're really just stumbling in the dark. If you still can't catch anything, consider an electrofishing survey.
I know, I've been slackin'. Work has kept me pretty busy but I'm trying to get back into the project.
I picked up a small pelican bass boat for cruising around the pond and tonight my 5 year old daughter and I tried it out. We both had a blast. This was pretty much just a test run for the boat but I did end up catching a nice crappie, which we don't see too often in there.
Luckily I had both a camera and several witnesses because there's a few that don't think we have any crappie in there at all. This was was just over 14" but I did not get a weight. He was photographed and released.