Ok well 80 is not high at all, I'm sorry but 95% of big breeders just have an ambient of 86 degrees and no hot spots and the snakes are fine. Go look up the average temperatures from Ghana and you will not see the lows dip below 78-79 usually. And the ground stays warmer than that even at night. Just because it gets to 70 here and there doesn't mean thats the best temperature to keep your snakes all year long. I bet your snakes spend most of their time on their hot spots. I've never heard of keeping snakes 75 ambient.. maybe the cool side the most but not the whole enclosure. The snake is not suffering if he spends most of the time on the warm side because clearly if he was "too hot and suffering" he would be on the cool side in his identical hide. I really don't think he drinks much from his water bowl. Thats my concern. I live far up North and if I had 75 degrees for the majority of his cage I would have a RI because is is drafty here most of the year.