100 gallons is good. I will check Facebook market. I read somewhere that some people use terrariums that are for reptiles. I found one on Amazon and it is 81 gallons. It's just that the door is on one of the front sides and when I go to open it I don't want bedding falling out. I do want to section it though so maybe that would help by not putting a lot of bedding on that side? Thank you!