Nice looking clowns ! I have a trio in my 75. The Mochas hang out on one side of the tank with the BTAs. The other one hangs out with the frogspawn and hammer in the other corner. They only get close when it's feeding time.
I have 4 in my 240 for 3 or 4 years. They spawn in their too. In my experience multiples work pretty good in 180s and larger. Success is smaller tanks can happen for a while but once they are mature around 2 to 3 years old that's when the real aggression starts and people slowly loss the multiplies. A good deal of it is luck as well. I know more people who have tried and failed then suceeded.