I have a good size yellow tang in my 120 and I am getting a purple tang same size. I would like to keep them both . Question is can I take out the yellow and put him in my 55 refuge for like a week and then put both tangs in the 120 at the same time? Do you think that the yellow tang would remember the 120 and his area when I put him back in and still be aggressive toward the purple? Any suggestions would be appreciated.