I've just got one today
He's still about 15cm Ive kept him with African butterfly fish,bichirs,elephant nose,panther crab and butterfly sucker....... I fed him on frozen blood worms and he seems to like it :]
Guy at my lfs( who is a good keeper and active member on this site) has one and has been keeping it at the store because he is moveing, but the cat is only 24.5" long. It is 23 years old and has lived in a 125 most of his life and has recently been moved to a 220.