I am posting my shingle "Tang Police." I have heard enough rationalization as to why my adult tangs are happy in my 30 gallon tank, even though they can't turn around anymore. Since the term is meant to be a derogatory term, I will embrace it. It is our responsibility to provide our PETS with a happy and natural environment, otherwise leave it in the sea.
Anyone joining me?
One note, this doesn't mean a 1" hippo tang isn't happy in a 55gallon, everything is relative, but keeping it in there when it gets to 8" (about 2 years with proper feeding) is cruel IMO.