I would be very careful where you source your substrate from.
Raw Peat is good for keeping moisture but it is typically offered at gardening centers and landscaping businesses.
You will get a lot of extra wildlife if you are not careful.
Absolutely. Currently using Viagrow Coco Chips. When I received then I baked the amount I used for a half hour at 250 degrees. I won't use anything that might introduce unwanted things into the enclosure.