I have 4 IT's I got in January at 2". They vary from 4-6" now. All are pellet trained since day one. The other day my friend brought over some goldfish that he raised. I dropped a few in. First time these guys have ever seen a fish that small, and of course they were gone in seconds. Well, my biggest one now spends most of his day hiding next to some driftwood pointed up with very vibrant colors. I have 7 4" silver dollars, and every time they swim above him he darts at them. He never grabs them, just stalks and attacks. This has been going on since last Friday. Pretty funny to watch. I don't plan on doing this again, it obviously causes some predation I don't need.