SOme people have good luck at first getting them to feed in a small tank say a 55 . But you need to imedatly plan an upgrade . They grow fast and need a big tank . Believe me you dont want to try and keep transfering them . not only is it a pain but its also unnesecary stress on the shark. Honest opinoin is don't get it unless you have a tank in the ranger of 300+ gallons .