Ok, basically starting over with my 4ft 120g tank. I'd like at least one of the smaller bristletooth tangs. For sure the white tail and maybe one other. Am I looking for trouble with two bristletooths? If I add at the same time would that be ok? If not two bristletooths then what other smaller tang? Also, should I wait and add the tangs after adding other fish? Any issues with Tangs being first? Thanks for your help.