Thai Tiger Tarantula

I open the lid and can see the water dish half full (because I’m an optimist) and a slab of cork bark. I take the water dish out, clean it, fill it, and return it. I take out a couple of pieces of debri that I see lying around. I dump two fat crickets into the tank and close the lid. I return the tank to the bookshelf where it resides, and stop. What the heck is in this tank again? I purchased a beautiful Thai...