my 2 RTC eat Bassa Fish Fillets, I unthaw it in cold water about an 1/2 hour before feeding, even my P-basses and Plecos love it. I cut it up in to 1" wide strips for the large one and smaller pieces for the 8-9" guy, neither will touch Massivore pellets, tried that, they both just went for the other fish, my larger one likes seaweed sheets, once in a while, supposedly they will eat some fruit as well, haven't tried it yet though.