Howard I had one for a long time. Not really the coolest cat around. They are very shy and VERY skittish. Mine was so skittish it would bang its head into the glass every time I tried to feed it from a stick to get it off live. Honestly I know pellets arent impossible for anything however I think you would have your work cut out for you on these guys. It took me 8 months to get mine off live and that was the end of it. MP for sure. Mine loved them when on them.
If your thinking about them in your big tank I would say take a pass. They dont do well with tank mates however mine lived with some pims and did ok.