Clownfish with Firefish?

So my pair of Ocellaris clowns have been in a biocube 14 for about a year and a half and they have grown to what I feel to big for the tank. My question is if I move them to my 56 with all passive fish such as my trio of firefish, will the clowns show aggression and nip at my firefish? I really care for both sets of these fish so it's a tough decision because of how good they have done since I've had them.