Hi there, i have to disagree with 8th Chevron , this is absolutely a K related symptoms , you can see this from the colorful splotches. i see you're adding a lot of nutrients already, sometimes for cannabis the nutrients are heavy on P and not heavy enough on the K but in your case i do think it's the opposite problem : overfertilisation leading to nutrient lock out, so you see the symptoms of deficiency but actually it's because it's too much. So you need to remove the salt nutrients from the medium by flushing and reducing your nutrients going forward. Sorry for the bad news, hope this helps ! 🚀