Although the yellow tails are known to be less aggressive you might want to consider chromis instead. Also, there are some lower priced fish like lawnmower blennies you might consider. Lots of personality to them and it will be a workhorse in your 55.
Although I do currently have a yellow tang in my 55g, I'd advise you to stay away from tangs in yours.
Although I do currently have a yellow tang in my 55g, I'd advise you to stay away from tangs in yours.
