if you have a big tub they can live in there for the rest of their lives however my opinion would be to just fix the temperature and humidity in your (likely bigger then a plastic tub) glass tank. you can increase humidity with using spagnum moss and reptibark bedding and/or misting. for temperature you can get an extra heat source (uth or lamp) if you do decide to use plastic tubs however you can ditch the lights but make sure they are not constantly in the complete darkness so they can have somewhat of a day/night scedule