What is that white ball?
Its a rolled up paper towel which I keep soaked for her.
Just to elaborate on this point for the OP, the hairs on a tarantulas body trap air making it impossible for them to sink and drown in a water dish.You only need a waterdish with water in it. They can't drink from sponges or paper towels. Also, it's impossible for tarantulas to drown regardless of species.