You will have to click on watch on youtube.
This is something I have done locally. I love the fact these guys did the same thing and are successful on a wider level.
I buy cases. I buy 50 lb. bags. Robert and I always agreed that it would be great if someone oculd sell to our members at a Co-op price.
Enjoy the show.
Tubes being impalnted to provide aeration to rootaone, is a SOMA idea, or merely a natural farming commone sense solution to aeration in a grow bed.