I haven't seen your tank yet but the typical paludarium is not really appropriate for tree frogs. Of course it depends on you setup. A 29 gallon is not nearly big enough to mix species. In fact your going to be hard pressed to find anyone on any frog forum that is going to condone mixing. Its best to keep your different species in separate tanks so you can avoid any problems down the road. You also need to check for your baby. Just to make sure he hasn't drowned yet. You also need to make sure he is eatting. Check out the care articles for your particular frogs to make sure you've covered your bases.