hey i have just come out of a non feeding stage too. Mine wasn't from tank to tub though. I was from 41qt tub to 28qt tub. same color tubs just different size. Crazy thing is my snakes are 1000gr each and 3 of them just would not eat in their 41qt's. Go figure, they ate in there all last year until dec 2012. finding the right encloser is a big part of the husbandry practice i'm finding out.
Glad your snake is back on the right track. Best of luck to ya.