I currently have a A. gigas living all by herself in her spacious and luxurious 10 gallon tank with all of the compost and mulch she could ever want. I was looking to possibly get another millipede or maybe even a few more if they had room. So how many AGB's could fit in a 10 gallon, just females no males (if that makes a difference), don't want any little AGB's roaming around my house yet Just looking for some insight on to how many more could fit and if there would be any adjustments I would have to make to the tank. Thanks!

I'd say up to three or four adults, possibly as high as six.

Babies are no problem, they can be kept with the adults and provided there is adequate dead leaves etc and plenty of other food they'll do fine without extra attention UNLESS you get cage pests that out compete them for food. That's the hardest part about rearing babies, making sure the substrate/food doesn't have any pests when you put it in the tank. In the unlikely event of an escape, the babies will die from dryness very quickly unless you happen to have moist leaf litter all over the floor .

Wade