sure can, hes a sissy. he sits upside down behind a rock most of the day when I first got him, swims all over the place at night and now that he has been in my tank more than a week he swims during the day. has yet to eat but I have read thet they wont for a while :/ one day his eye was just white. looked swollen or pussy. just white and gone. still swims and functions normally. was wondering if this will go away, and no hospital tank... can i treat him in the tank he is in now?