I’m looking at getting a tang for my tank. Dimensions are 4ft long by 2ft wide and 16 inches tall. The store has a baby blue tang (less then 2”) or a white tail bristletooth that is 4.5-5.5 inches. Originally I wanted the white tail but I preferred a baby one. Which one should I get? I know the blue tang can’t live in there long term so how many years would I get before I have to rehome him? I’m not sure how quickly they grow. I love both and I think I like the look of the white tail more, just not sure if it would be ok adding one that old to the mix