Two Anemones One Fat Clown ?'s

[BMW Rider]

I have a large tomato clown in my 75 gallon now. I will be moving all livestock to a new 125 in a few months, but will not have any corals, anemones, etc. right away. If I add another tomato clown then, there would likely be less chance of the big one being aggressive wouldn't there?. The concern I have is, woill they need a host anemone right away, or could that be introduced later on?