Can hydroton be used for hempy buckets?

I was thinking of trying a couple of 2ltr hempys. I was wanting to know if you can use 100% hydroton or is it better to use something else? What medium is better for hempy buckets?

Soil or coco coir works best

Thank for the reply. So do you use coco for Hempy? How you set it up? Is it the same as you would with perlite?