I've had him for a year so yes Fall 2014 to Fall 2015 *or winter now I guess* He last ate November 18th and he weighed about 1193.7 grams then he was supposed to eat the 28th but he was in blue (which before hasn't been a problem, he usually eats in blue but not this time). Then he did a few bowel movements and he was last weighed the 20th of December and he weighed 1168 grams so he lost about 25 grams which seems like a lot.
I don't think husbandry is the cause of going off feed, it's been the same since he moved to his bigger tank which happened quite awhile ago back like in March 2015 he hasn't had a problem with eating since we switched him to a bigger cage. He has a hidey on the hot side and water on the cold. There are UTH on the hot side that is controlled with a thermostat, the humidity is normally around 40% though we've been trying to keep it higher. We have a 30 gallon tank though I want to upgrade it to a better/bigger tank.