I do not know if 13 months is successful. I have a bandit now for 13 months it was directly imported from Hawaii a 37 hour flight at 7cm. The fish came in with 12kg water. I started quarantining it directly with the bucket method. It only started eating on day 5. It was eating only floating pellets ( small new live spectrum ) then it started eating ocean nutrition pellets. On day 7 it started eating frozen mysis ocean nutrition then on day 8 I moved her to my tank not long after that she was eating angel formula. She started showing sighs of flukes then I put her threw 4 weeks prazipro . She is eats every thing now even nori but pellets are what she likes most and only ocean nutrition pellets not other makes. In the morning she gets formula 1 pellets and nori in the evenings she gets angel formula frozen then one of the following clam on half shell or mysis or krill or mussel after one of them formula 2 pellets. I keep the tank under 24c temp in summer in winter i let it drop to as low as 22c
My bandit is extremely aggressive for a bandit I think that helps a lot even chasing my 13cm black tang my bandit is now just over 9cm