I've kept Malis and other uros for years and have always used a reptisun 5.0 on the cages in additional a heat source of course.
I set the cage up so there is a warm end and a cool end with hides at both ends. The basking area would be at 110F or so....and the cool end about 75F. The cages had a sand substrate and were decorated wih driftwood branches and rocks including a pile of bricks with black slate slabs to form a hide and a basking area at the warm end of each cage and a similar hide of bricks and a slate slab at the cool end. I did have a small water dish in the cages but didn't use them all the time.
I fed them an assortment of greens (dandelion greens, collards, endive, escarole, mustard greens, kale, etc) and veggies (carrots, squash, zucchini, sweet red pepper, sweet potato, etc) and a very small amount of fruit (apple, berries, melon, pear, etc). As theybwent into brumation in the winter I cut this down gradually to almost nothing and added a dish of dry lentils. I dusted the "salads" with calcium at most feedings and once in a while with vitamins.
I never got fertile eggs from them but I also didn't hibernate them at temperatures that were low....just brumated them. Hibernating takes more "skill" since you can lose them if its not done properly IMHO.
Hope this helps.
