I think there’s also room here to simply say, “Look guys, I understand this is hard, but I’m going to try it. Help me make it a success.” People attempt difficult things in reefing all the time and sometimes they pull it off.
The sad part is when it goes poorly, an animal(s) dies.
The challenge with the “I’ve done it” or “I saw someone else do it” argument is that it’s technically true. But many of those successes are either luck (1in 10), or the result of someone who spent time identifying the challenges and building a plan to manage them. The people who approach it that way can actually have pretty high success rates.
Adding a third tang right now is a low-percentage move my guess is something like a 75% chance that aggression eventually results in mortality, either between the tangs or redirected toward another fish. With tangs there’s also a real risk of an stress-induced ich outbreak during the process.
If I were going to attempt it, it would look something like this:
•
A bristletooth tang is a good choice. They stay fairly small and their body shape and feeding behavior are different than most other tangs.
• Multiple weeks in an acclimation box would be mandatory.
That single move probably increases the chances of success tenfold. Here’s a
video showing how to make one, and a link where you can watch it for
free.
• Commit to managing food aggression long term. Make food abundant and constantly available. Seaweed Extreme pellets on an auto feeder, nori sheets in multiple spots, AF Vege Clips, etc.
Be ready to up your filtration or water change game to accommodate.
None of this guarantees success, but if you’re going to try a low-percentage move, stacking the odds in your favor is really the only way it works. I bet you switch from 75% failure to 75% success rates with those things alone.
One of the things about seeing what good looks like is you can now choose between doing it or saying "not worth it" and moving on to something else.