No, and don't you dare try it. Fire-bellies are small enough to be eaten, and if a White's tree frog gets the toxins in it, it will surely die. Mixed species enclosures never work, and here is an article on it: http://www.caudata.org/cc/articles/M...isasters.shtml
EDIT: Sorry, didn't realize that there were no Fire-bellies. If you clean out the tank thoroughly, it should be fine![]()