My Argentine black and white (about a year and a half old) is in shed, and after his bath and after he was dry, I decided to slowly take off the parts of shed that were loose, and I noticed a small crack or, what looked like it. Running down his tail vertically. I've wanted a tegu since I was 8 and, for the past 3 months hes been so amazing, I don't want to see him hurt. But, I know if I get emotional I'll make mistakes. So I need some advice. His basking temp is about 114 degrees Fahrenheit, taken with a heat gun, and with an ambient of around 80-70, he is in a glass enclosure and I spray him down with a garden sprayer filled with clean water, he has a large bowl and is in a glass enclosure that's about double his length filled with about 4 inches of mulch and bark, I feed him various meats, pinkie mice every week, usually feeding him crickets dusted with calcium daily and various fruits and veggies, although he only really goes nuts over repashy gecko diet (only fed as a treat about twice a month), black berries and blueberries. I'm gonna get some mineral oil to rub his tail after baths and am also gonna bathe him more often, I usually only bathe him once or twice a week. If that. I'll change to once a day. Sorry its so long, I just want to throw out aaaaalll of the info, thanks. (Photo of crack attatched)