Ah yes, patience, patience, patience.
I would be very slow to add any other clownfish. I have two clarki in a 65 gal. tank, but they are very aggressive. I would fear putting any other anemone fish in the tank, as they would be very aggressive toward any anemonefish or similar species. I heard that tomato clowns and maroon clowns are also very aggressive. :mad:
Of the very peaceful type, they recommend introducing them all simultaneously, or change the furniture around so they all start out looking for their territory at the same time. When I bought the clarki, they were housed at the pet store with their anemone and so were already attached to it. The adaptation was easier. I put them in a 29 gal with a screen divider so they had a small corner of the world with their anemone and not overwhelmed by the whole tank territory to explore.
But that was history, since moving the clarki's and anemone to a larger tank, instead of feeding their "friend", they steal food from their anemone that I now must target feed. :mad:
Is your anemone(GBTA) very large? They probably would enjoy a larger anemone.
Good-luck
c-c