^^ I agree with the member above me. AFTs enjoy a higher level of humidity than geckos and Carlos is right, there's a strong possibility that the male will try to breed regardless of species. Either way, it really sounds as though your gecko isn't comfortable with the AFT so I would stick to having two tanks...it's only fair. If you want to add another gecko to your tank then it'd be better for the geckos to stick with their own species.
