Blue Cheese

Serious issues with this one going back a couple of weeks now. Thought it had just been underfed so have upped its feed, but now it seems it's just not drinking water so there's definitely something up with the roots. Watered it 4 days ago now and it's still pretty heavy. There's no wilting or drooping and it's taking some water, but this is clearly why it's not getting its nutes. Leaves curling slightly to try to slow photosynthesis and exhibiting clear K def. Leaves are fucked. At this stage I'm not sure what I can do except let it dry out, double check ph and wait to have a look at the roots. No bad smell coming off at least. Never had anything like this so not really in my experience. Other plants in the tent are doing just fine. Maybe the roots got burned or something, but I'm using organic nutes so I wouldn't have expected it. Just want it to limp to the finish line now. Runoff is 6.8