Hi Erica and welcome!
The most common reason a "new-to-you" tortoise doesn't eat is because he's worried about being in a new area and being taken out of his old territory. It takes a couple weeks for them to acclimate.
The most common cause of a tortoise not eating is because he's not warm enough. I think you have both those 'common causes' going.
Yes, he needs a UVB light and yes he needs his enclosure warmed up to about 100F directly under the light, fading to room temperature as you get further away from the light.
If a tortoise can't get his inner core warmed up to at least 80-85F degrees, he won't eat, as the food can't digest and just sit in there and rots.
The most common reason a "new-to-you" tortoise doesn't eat is because he's worried about being in a new area and being taken out of his old territory. It takes a couple weeks for them to acclimate.
The most common cause of a tortoise not eating is because he's not warm enough. I think you have both those 'common causes' going.
Yes, he needs a UVB light and yes he needs his enclosure warmed up to about 100F directly under the light, fading to room temperature as you get further away from the light.
If a tortoise can't get his inner core warmed up to at least 80-85F degrees, he won't eat, as the food can't digest and just sit in there and rots.