My sohal is my boy. I've had him for 3.5 years already. When I bought him he was dam near dead from a LFS. I was given an awesome deal. So I rescued him. I QTed him for 2weeks then put him in my 150. Had him in that tank for a year or so with a yellow and blue. One weekend when I was out of town the solenoid on my co2 for my cal reactor got stuck open and the pH in my DT was lower then 3. That was the lowest my monitor would read.
The sohal and nems were the only thing that lived. So I had a buddy watch my things tell I upgraded. A few months later I finished building my current system a 180 peninsula.
He was the first fish that went in the tank. About a month after I was given a purple tang from a club member. They did not fight at all at first then the purple started to flair up on the sohal. That ended pretty fast after the sohal put him in check. A few months after that I was given a yellow and a blue from another club member, his tank crashed from chemi clean. The yellow and blue where on there last leg when he brought them over. I put them in my fug for a few days to get them strong enough to defend them selfs. A week later I added the yellow and blue with no problems. It stayed this way for another month with no fighting. Not until I added my last tang witch caused most of the drama and that was a clown tang. A few minutes after I added the clown the sohal went nuts on the clown and chased him for hours. I couldn't get neither one of them out so I had to do something to get the sohals attention. I put a full length mirror up on one side of the tank. Immediately the sohal went from chasing the clown to fighting his reflection. I left the mirror up for 3 days. Then I took the mirror down a 5 tang were fine and there has been minimal fighting among them. For the last year maybe longer. I even added a CBB 4 months ago and every thing is fine.
I will say that the sohal is the king of the tank and all of the other fish know that. He will make sure he knows it too. Also the sohal is a fearless fish in my eyes well mine is. He has no problem with coming right up to my hands and checking them out. He even lets me pick him up out of the water with no problems. As soon as I put him back in he's back at my hands to check them out again. He has never backed down from any one of my fish. The guy that watched him for me while I didn't have a tank. Had him in a 75gal with a 8" lieutenant tang. My sohal was 4 maybe 5" and he killed the lieutenant tang.