I’ve been using media like coco with stellar results. If you want I’ll tag you over to my journal and you can hack away at it. Some power growers weighed in on some issues that are worth looking at.
I have never grown an auto; I prefer to control the parameters myself.
I was a no nothing grower and pulled 8 oz off of my first plant. Bag seed too. It’s not that hard, really; keep the PH right, don’t over feed or over water and give them enough light.