We have to have a secured indoor enclosure that is a minimum of 4'x2' for our Russian Tortoise. He is currently in the bottom portion of a Ferret Nation cage with plexiglass secured on the exterior 4 sides, which creates a tote-like environment but has a secure top that allows airflow. We have 2 cats and 3 boys 8 years and under, so we need an enclosure that is secured. We struggle a lot to keep his substrate moist and temps adequate (we live in MN where winters are long, cold and dry), so we are considering getting a 125 gal aquarium to use as a new indoor habitat for him. What are some pros and cons of using aquariums for torts? Anything specific we will need to watch out for? I worry about bacteria growth if it ends up being too humid...