Hi carn1vorous, you can start a new thread if you have any questions regarding piranhas.
to answer your questions, there's not fix schedule or food type and it's different from people to people. if you can get them on pellets then you can use that as stable diet, or mainly use white fish as stable diet. other meat type such as chicken or lean beef/beef heart, etc can be used every once a while if you want to use them. there's really no set rules about it, just mix things up and variety is the key.
Thanks


