I dont know about anyone elses rbps but mine shred whatever hits the water and leave it in pieces or eat it completely,I was feeding them convicts for a while but my supply ran out so Im back to large feeders,beef heart,pellets,green beans,flake,...ect.krill.my previous trio took out various S/A cichlids that people gave me that swore up and down they would kill my fish.Like always they wound up trying to breathe with no organs (kinda hard when youre hollowed out) anyways thats my experience with these guys.Right now I have 4 four to five inchers and 7 2-3inchers.