Tony K,
I have unwanted BG and am removing them with trapping and hook/line. At night I noticed that they didn’t swim off when we shined a light on them. The next time down there I’m going to try to shine a light on them and net them out of the pond. My father Inlaw has a pond with lots of BG that hammer the food when tossed out. If I had that same situation I would throw out a handful of food and throw a cast net to remove them. Hopefully this gives you some ideas before adding green fish. Does anyone know if WE, NP or TM would help?