I'd mix some of that substrate with some sand, as coco fibre when dry does not really support burrowing. [Here is my *Hadrurus arizonensis* care guide ](https://www.macrobuthus.info/care-guides/hadrurus-arizonensis/)

thank you for the feedback, i’ll buy some sand for the rehouse 👍🏻

Hey, I’m looking into getting a giant desert hairy and some bdfb and this guide helped me a lot!