I don't have any experience with coco husk, but I suggest coco fiber. It is much more fine and does a great job holding humidity. I also believe it does well in promoting burrowing and looks more natural as well.the walnut shells was from the pet store. Then I moved to coco husk. now i have a finer coco huck that hold the moisture better.
Ah ok, didn't read that last bit saying you moved from coco husk, sorryit is the fiber. Just check the packaging, Its alot better than the husk I was using before
To find out it's sex check out this link: http://aqua-terra-vita.com/Images/Scorpions/SexingEmperorScorpions.jpgyup. Not sure of sex or age yet