I've been trying to get a new enclosure for my Russian tortoise, and when reading the care sheets/guides, it seems like there's some contradicting advice. I don't know if I need a covering for the new enclosure(the old one does not), some sources say it's beneficial, while I've seen others say it's harmful. I know the enclosure should maintain a certain level of humidity, and since the substrate tends to dry out easily, should I get a covering to better regulate the humidity? For the overall enclosure, would using an emptied bookshelf with the shelves taken out be okay, or is it absolutely necessary for me to purchase one? I'm trying to get a relatively big enclosure, as the care sheets recommended. Would you usually put the enclosure on a table, or is it okay to put it on the floor? Sorry for the many questions.