I'm not sure if anyone keeps their dumerils in tubs, but I currently have mine in a 41 qt. she is roughly 3 feet and about 500grams. I know an adult ball can be housed forever in a 41 qt, but when should I move her into her permanent home? And what size should it be? She is a female so I'm estimating her being around 6'. So how large should her permanent home be?