GBtortoises said:Generally, most Middle Eastern Greek subspecies do best at ambient humidity levels of 50-60%. Some suggest as low as 40% but with humidty this low young tortoises with low body mass often struggle to remain well hydrated. Some people keep an indoor enclosure fairly dry and warm but spray hide areas or provide mounds of moss that retain moisture for the tortoises to burrow into in order to be exposed to some moisture. Moisture is fine with Middle Eastern Greeks as long as temperatures are not too low, below 65 or so.