I'm very new to reptiles and am wondering what I did wrong. Purchased a young BP from a reptile shop, and he died within a week.
Set up; 50 gallon tank with UTH and ceramic heat element, plenty of items in the tank to make it not feel so big as to stress out the smaller snake. Hides on both hot and cold side. Gradient is 90 hot 80 cold, + or - a degree or 2. Humidity sits at 60%.

Yesterday, I attempted a feed, and he refused, last night he was just laying in the middle of the cage, not moving, not in a hide, just laying there. This morning he's dead. What the hell happened?