Found this info right here on KS.



One thing which commonly gets over looked is the level of humidity in the tank. Since Ball Pythons spend a lot of time underground in burrows or in termite nests, they are more sensitive to relative humidity than one might expect.
I would suggest you stop by your local K-mart or Wal-mart and get a hygrometer× from the outdoor/garden section. They are accurate enough to provide a close estimate, and allow you to monitor changes in humidity.
I recommend the ambient humidity be at least 60%, and you may want to provide a hide box which has a higher percent (70-80%). Low humidity can cause incomplete shedding, dehydration, and sometimes a lack of appetite. To either add or remove humidity, you can provide bigger or smaller water bowls. You can restrict, but not stop, air flow from the tank. You can use porous substrates (i.e. mulch) that will hold some moisture and mist the cage every so often. I feel that if you provide a big water bowl with a hole cut in the lid, the snake will use it as another hide and soak/re-hydrate itself as needed.

Hope this helps.

David Perkins

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