If I could find a couple of large plecosomus (scaled catfish) I'd turn them loose in the pond, but dang, they want a small fortune for little ones, much less a big one.
I raised one to about 15" in a 100 gallon tank. Wonder how big they'd get in a pond!!
Plecos can only survive in warm water. I think they have naturalized in south Florida. They would die in winter in your area. They get about 30" I think, in the wild, in the tropics.
