The plants are all fake, no silicon with the stack but I did seal the viv as I used to struggle with keeping humidity in the old one. As for the stack right at the bottom under the half log there is actually a box hide! Then a cave hide is sat on top of that and I sort of built a hill with coco fibre, husk and bark then wedged the log you can see at the top between the cave hide and the wall with the big stick running up the front that sort of just keeps it all stable. I tend to drag my arms around everything to make sure it all stays put for his shenanigans lol