so I just got 3 baby piranhas about a week ago. They are....about an inch or so. Maybe 1 1/5. And as of right now, i'm feeding them brail shrimp. Twice a day. When I got the fish, there was a feeder fish in the tank that the guy accidentally scooped up with the babies. That feeder is now gone, after about a day or two. So my question is, is how long do I have to wait before I start feeding live feeders? Thanks for any help.