I can't turn it around or upside down, and since it looks a hell of a lot like cedar on the inside, I'm going to assume it probably is.

Is there any way to coat the entire interior with PVC liner and use aquaria-safe silicone to nullify the danger of cedar wood? Or is the problem more complicated than that?

Because otherwise, I'm going to (once again) have to look for a new piece of furniture on craigslist or a consignment store to house her in. If I do, is there any other wood I should avoid?