Thanks for the replies.

I have assumed that there are some plankton blooms, even if weak, simply because there seems to be a self-sustaining population of LMB and BG. This may not be a good assumption. The water does get less clear in the summer, but usually you can see at least 4 to 5 feet using a Sechi disk.

My goals are pretty simple. I would like to have nice size bass and big blue gill to catch on a fly rod. There are some beautiful sunfish in the pond with colors or red and aqua. I am not trying to grow any 13 pounders as I am not sure the pond would support it.

From what I have read, it seems to me that fertilization would not be effective because of flow through and low pH. I was going to compensate with a second feeder instead.

I am going to try to add the adult CNBG this spring.

I am still not sure whether to add any more Tilapia if these make it through the winter.

Getting lime to all the pond is going to be difficult. Trees come down to the shoreline all around except near the dam. Will lime spread on the ground in the watershed eventually effect the pond water?

Are the liquid lime products I see advertise as effective as ag lime?

Thanks again for all the good comments. This forum is one of the most educational I have ever seen.