i havent put any feeders in there!!! never have. all i put in there were some bluegill. which i have taken out...accept 2...which i cant freakin catch. i do want to throw 100 neons in there....but those are not "feeders" just like other people do...alot of people have neons with piranhas. thats what my goal is to do as well. so if there are 100 neons on there chances are that they will establish themselves and the piranhas will coexist