Tangs For a 65G reef

[kenter16]

I have a 65G setup that i have had for three months. We are just starting to stock it with fish. We really want to add a tang, but are not sure if they will work in our tank. Some websites say that for the Yellow tang, Hippo tang and the Tomini tang can fit in a 55 gallon tank, others say 75. I was just wondering if any has one of these tangs in a system less than 75g. Or would i have to get rid of it after a year or so? Any other suggestions for tangs that would fit...