I want to add my last tang to my tank and that will be an Achilles tang. I have a purple a yellow a blonde naso and a hippo and last and they all get along and have been in there a year, any advice on introducing and Achilles should I buy a larger one or smaller then the other tangs. Fatten him up in the sump or not? Pretty sure the hippo has ich but never flares up on any of them.
Any advise will be appreciated.