It is normal for them not to eat. They just got a new home, and may be stressed, or maybe just not hungry. Some balls for months without eating. They hold the record for fasting I think!!!! You could get two tubs for the two males, but then you would have to get two more heaters and two more thermostats, and possibly more heaters, and hides.... it gets expensive quick.
Just keep reading and researching, I've spent hundreds of hours reading about these critters and I am still learning.