Types of wood to use for dart frog vivarium

[megsfrogs]

I am in the process of making a 10 gallon tank for a pair of juvenile dart frogs species yet to be decided. I have been working on this tank for about a week now. I have owned pacmans and Whites Tree Frog but these will be my first darts. I will be moving up to a larger tank after about one year, but would like some advice before I get my frogs. I found a branch of what I believe is fur. Can anyone idea this branch? I would like to know if I should keep this in my set up or scrap it all together and find a nice piece of grape wood or something else. I did bake the wood for 2 hours in my oven before putting it in my tank. If anyone can help me please let me know you opinions. If you have any other ideas about the rest of my set up please help. Still need springtail culture, pods/huts to hide in, and glass lid (only have screen lid right now). Attached is a few pictures of my setup so far.