I am long term fostering a Greek tortoise (Bobbie) for family friends while they are on extended work assignment in Germany. I have had Bobbie for 7 months and have been following their care instructions. However, I have never owned a Tortoise before. I stumbled upon your website and am excited to join as there is so much more to caring for him than what I was instructed. My first concern is getting the correct amount of humidity for him. I live in Northern California near Sacramento. Please tell me how to create humidity that is correct for him.