How much does he weigh? That will give everyone a better idea of what you should be feeding him.
Most breeders or hobbyists who keep them in racks give them 1 hide or no hides at all because the tub acts as a hide itself. Tubs are generally smaller and more secure for them compared to glass tanks so you need to make sure you provide plenty of security.
I would wait until Saturday to feed him. It would also be a good idea not to handle until he's eating consistently for you. (3-5 meals)
For night time behavior, they're nocturnal so expect to see him more at night!