I switched my 2010 male super pastel into my rack and he has stopped feeding. It has been a month since he ate. He had lived in the same 20L since I've had him. He has never refused a meal up until now. What should I do? I'm thinking about just putting him back in his tank... His temps are all correct and I even tried putting him back on newspaper instead of the aspen and putting his hide in the tub with him, but no luck.