After speaking to a few knowledgeable people (you know who you are), I added three same sized juvenile yellow tangs at the same time to my 125G. One was killed by my female clown (who is now in a different tank). So I was left with 2. They seemed find for a couple of weeks, but one of them has grown a little faster and is now a bit larger than the other. The larger is bullying the smaller with some gusti. It looks like the smaller is trying to submit but the larger one is making sure the smaller one stays in a corner of the tank. At point pont do I need to think about separating them?