I had 3 false perc's hosting together in my BTA-when I first put them into the tank they went right to the anemone....I didn't have them long as I had so many tank troubles...so I don't know how they would have gotten along after a long period of time as my tank is not big enough for that many clowns and at the time I didn't know anything
but you CAN'T force a fish to do much of anything...if they want to they will