Early on in my pond days, I put 5 or 6 koi into my pond. I learned afterwards that they are bottom feeders and live their life on bottom eating the eggs of my BG and LMB. I have no interest in them now and I want to get rid of them. The problem is that I never see them. Last year I had an oxygen problem and when I did, I saw them on the surface. There were probably 2-3 different koi that I saw.

Does anybody have any suggestions on how to get rid of them? Are there traps that I can put on bottom that will catch them with any reliability? Would they eat catfish bait if attached it to a hook and set it on bottom?

Thanks!