As I never had any answers to this post I thought I would put up an update in case anyone else had a similar situation.
I put my two frogs in their feeding box together first to see what they made of each other so that if there was any aggression it would be easier to grab them out of there than it would be in the tank. I introduced them and they just kind of looked at each other for a while. I left them for about 10 minutes then as there was no reaction from either frog I went ahead and put them in the tank. once in the tank the original frog started to watch the new frogs movements and I thought at first that there could be a problem but I just left them alone and kept an eye on them.
Luckily there was no aggression and at first they just did their own thing but over the last few days they have started sitting together in the same spot. They now love sitting together on their ledge.