Well, I've only fed him shrimp pellets and bloodworms. I've tried feeding krill, but e doesn't seem to want it. He also stalks my rummy nose tetras, but is too slow to get them. As for tankmates, he's in with GBR's, Bolivian Rams, rummies, BN Plecos, Otos, and a roseline shark, as well as a red tail shark.