Emeralds are from the opposite side of the world from chondros. Raise the temps up for the green trees. 87 to 89 in the hot spot with room to cool down to 83 is good. Sounds like he might be developing upper respiratory infection. It could just be male fasting. Higher temps will make him more prone to eat and if RI is setting in it should help that a lot too. It will also trick him into thinking it's summer time again. 83 is too low for a chondro IMO. It could just be male fasting, but if it's RI and it gets severe it will kill a snake quick. See my "sad day" thread.