Another recommendation for you... See if you can find some nice heavy tree branches for the big fella. Rinse them thoroughly and then bake them in the oven at 250 to 300'F for 30 minutes to kill any bacteria or parasites. Watch the branches closely while in the oven. He would also probably love some plants to perch on. I would recommend a pothos plant. Rinse it very, very well and remove all soil and fertilizers. Then rinse in dechlorinated or spring water. Replant in the terrarium soil. You can twist the pothos vine around the branches and he'll love it. He is a tree frog, not a terrestrial frog and they love to hide and climb across trees. You can do some in the other tank too. Nice wide branches provide nice perches. Take a peek at the vivarium section here and look at the tree frog vivariums.