No, it was specifically for its aeration role. Surprised me too as I would have thought it would be part of the normal suggestions like perlite, pumice, sand, etc.I've never heard of it being an aerator. It's carbon. It holds water. I think he meant its his favorite ingredient and perlite the aerator is his 2nd fave? Listen again. Got a link or title I can google?
I'll have to see if I can find a link.