u/Over-Election-9877

This is my first time doing a bioactive enclosure of any sort, but I do need some advice on my tank. Is there enough cover or should I add more??

(Both pieces at the bottom are from the same tree) I’m preparing for getting an African fat tailed gecko and I was outside collecting some pieces of bark to use as potential hides. I think only the piece of bark at the top right is safe to use as a hide and all others shown have possible risks involved. Can anyone help identify what tree these come from and if they’re safe??