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The only other tang that I have heard is acceptable in a tank that size is the Kole Tang. Please correct me if I am wrong, but I think that and the Yellow are the only ones that can go in a 55G tank, but of course, a 75G would be better.
Just curious Hara but why not the Achilles Tang for a 75 gal which also gets to 7"-8" Max?
Also you didn't mention the Purple Tang which also lists a 75 gal tank as min size.