and I thought I had the least scientific approach on MFK.....Dude--
You need to take ALL those fish, put em wherever you can while you order another tank. Or 2 tanks. It takes years to grow fish like that.
Nobody can tell you how/if adult fish will work out in a tank. Can't be done. They may all get along fine together in the tank they're in now, and go nuts when you move em to a new tank at your house.
They may tolerate each other and hate every fish in your tank if you just take 1 or 2. They likely "get along" in a community but get nasty when new fish are added.
There's no way to know. All you can do is try and hope for the best.
Go to a bar at 10PM, predict who's gonna be fighting in the parking lot at 2AM. Same thing.
.....BUT YOU BEAT ME!!!! LOL