Tracy mentioned that they did well with no preds, I out 10# of them in and they grew like crazy to 12" but I never saw the first baby TP cause I had preds before I stocjed them. Either the LMB ate the offspring or I had mostly males. When the water finally got to cool for them I netted only one floundering TP out of the 10# stocked....... By the way they will hit earthworms. Next spring I will try to put more # s in and see if that helps. I had 0 FA after puting tilapias in. Mine never came to the feeder and neither do the blue cats or channel