I'm going to copy and paste a previous post.
Again, credit to SatanicIntention.
This is what your tank should look like.
Now this is what my tank looks like,
When it used to be this..
Once you get him on a good feeding schedule then you can move him back into a display tank with smaller hides and bowls.
Right now its important to get him eating, try getting a very small live mouse from petco (they have the smallest mice) and feeding that to him.