I will read up on fertilizing and try and get Langston U Aquaculture to help me out on water quality testing. Do golden shiners ever overpopulate in a bass pond? I had considered Tilapia but the price is killing me. I heard that Oklahoma Wildlife department would do a shock test for $50. That would be a good way to see exactly what I am working with. I have not been able to confirm or deny that rumor.:)