the nutrient ratios we spoke of wouldn't cause claw
I don't know what you did or didn't do but
this would be the process;
mix nutes in proper ratio (provided) and ph at 50% strength around EC0.5/ppm500 or something like that
flush them thru the coco until the waste water EC/ppm is close to the nutrient feed solution
wait until your next watering cycle and feed with full strength formula (provided) and proper ph
wait about 3 days to see improvement
what you did 3 or 4 days ago is what your seeing today.. what you did yesterday you wont see result for a few days