you should be able to keep them in a 17qt until at least 500g or so. Then up to 1000g in a 38qt tub. Males then go to a 32qt tub and breeding females into a 41qt tub.

That's how I've got mine sized. However, that said, I've had my sub adults in 28qt tubs since I got them (both around 100g). I just moved them to a 32qt rack and they've done fine with a couple of hides in the tubs. Now that they are 500g and outgrowing their hides, I'll be removing the hides to see if they continue to eat well.

In summary of what I do(because I know I just rambled):
  • hatchlings to 200g = 6 qt tub
  • 200g to 500g = 12 qt tub
  • 500g to 1000g = 28qt tub
  • males over 1000g = 32 qt tub
  • females are 1000g = 41 qt tub


Granted, you can keep a smaller snake in a larger tub so long as you offer plenty of hides and clutter to make them feel secure. I've housed 200g ball pythons in 28qt tubs with hides and have had no problems.