Oh ok. I think your overall temps could come up a bit. I would think 82f would be a fair elevation in overall temperature. With a basking spot of say 86f. How do you monitor the temps? Do you use a thermostat to control the basking spot? Shedding is a good reason for a animal to be aggressive and or defensive. Maybe some other members who have experience with the eastern garters will weigh in momentarily. If you don't have a ir gun to check the surface temps you may want to pick up one to keep track of the enclosure temps.