I have never gotten a straight answer for this question. I have a 4 year old hermanns tortoise. Right now his enclosure is around 80% humidity. I am wanting to change his enclosure into a tortoise table but there is no way that I can keep the humidity up that high with am open top. From my understanding, he only has to have that much humidity until he stops growing and then he can have an open top. Is this true? Or what are other ways that I can accomplish this or am I totally wrong?