Blue Ribbon Eel

[Jaws]

I'm planning on setting up a reef tank at my office and I've kept a few Blue Ribbon Eels in the past successfully and thought about maybe trying another one in this tank as the only inhabitant. Only problem is it's only a 34G Red Sea Max and every site I look at suggests 40G min up to 75G min. When I've kept these things before I always had pvc tubing under the substrate and they rarely ever came out for a swim unless they go searching for food because they haven't eaten in a few days. I guess my question is do you agree with those tank sizes under those conditions or do you think a 34G would be suitable? They're perfect tanks for Eels because they already have a tight closing lid.

Thanks in advance.