I worked in a hardware store for a short amount of time, only after i'd began growing with coco. There seems to be very little difference between peat moss and medium grade coco. I personally would never shell out the cash for canna, but if you buy non-pretreated coco, you are about to do some fuckin work son. You're gonna be looking at 2-3 hours to treat a gallon of coco, that's just my experience.