I had one a few years back. Went from 9" to close to 3' in 1 year. I fed him 1-2 jumbo shrimp raw, no shell, de-veined every 3 days or so sometimes longer. He would clean up whatever krill got passed the trigger and puffer. Lots of poop so a good skimmer is essential and having good flow along bottom to keep the detritus suspended helped. The are fun, people love them, and they don't need much space. I used to have to have my wife keep him away from my hand whenever I had to reach inside for something. He would go into a feed response and I did not want to be on the wrong end of his teeth!