I am concerned about the size of the tank for housing the 2 puffers. I have been told and have read that with an adult puffer, you should have at least a 125 - a 180 is better. Remember their size as adults, they get big.
We have a 90 and a dogface puffer in it. He has a terratory in his tank that is his and his alone. He won't bite or attack another fish, but he does communicate by eye to say, that is my chair or resting spot, oh and by the way, that is my rock. The other fish get the idea.
In with him I have a harleguin tusk fish and 2 fox face fish. That is more than enough for that tank and I will get them a bigger tank someday when they outgrow this one. They have lots of room now and he is doing well.
Go slow and plan for the future, that is my suggestion.