The tank is about a 180. I can't put a picture at the moment But there are multiple pieces of PVC pipes, and some Java ferns anchored to a large piece of driftwood. There are also a few "caves" in the back.
I wouldn’t. Peacock eels are tropical, and dojos shouldn’t be kept at tropical temperatures for extended periods. Also dojos need the company of their own kind, and would be a bit too active and boisterous for a spiny eel imo.