Wow, that's disgusting! I would assume that this person is afraid of this snake & couldn't manage to admit that to you, or wanted the job so badly? No good excuse though- poor snake. But I think she'll be okay, just get her home all cleaned up. Either this one or the other new tank. It might be better to really sanitize this tub (some diluted bleach, perhaps) which will take a while, so it's probably best to just move her to the other one right now, if it's ready & tested- I don't think she'll miss this tub-