Well I have seen this post here for a while, but I do not work with Aspera so I figured I would let someone else answer it. But since that doesn't seem to be happening, here is my 2 cents.
First off what kind of temps are you running? And do you have a large water bowl in the enclosure? Most of my candoia only deficate in the water bowl.
I would say as long as the snake is eating readily that you probably don't have anything to worry about.
Here are a couple links to candoia sites....
www.candoia.s5.com
www.kingsnake.com/candoia/
Good luck and keep us posted....
Chris
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Chris Smith
Contact
Captive Bred Herps

