I prefer fabric pots because the root zone requires oxygen. Those salt stains you see on the cloth is salt buildup that you would have had in your root zone that can hurt your plant.
Do yourself a favor and switch to organics. Why mix and measure your nutes and your runoff? Why would you want to force-feed your girls if they're classified as autotrophs that can feed themselves? It's just so unnecessary, especially when you move to organic growing. Research Coast of Maine Stonington Blend Grower's Mix and tell me that's not THE ABSOLUTE BEST SOIL for growing cannabis.
Lol. While I appreciate your eagerness, organics isn't the best way to grow weed. I have some organic runs that I do, some not. Some under LEDs some under cmh some under both. It all depends what I'm feeling like. The best way to grow is whatever way works best for the person growing it at the time they're growing it.
Many 'organic' nutrients contain way higher levels of heavy metals and toxins than salt based fertilizer, and advertise to people willing to pay for the words 'organic' on the label. While I'm all about sustainability and so on, I'm not about jumping on fads or telling people 'its organic'. The purpose of this thread was to discuss coco in plastic or fabric pots not organic vs salts.
There's a million diff blends of 'living soil'.
Coots, subcool, kis, etc etc. They're all basically the same thing with slightly different inputs.