IF IN DOUBT FLUSH IT OUT...FIRST. I see the beginning of nute burn on the back leaves towards the top of the picture, The deforming leaves indicate a problem. Does not matter what you have done the right first thing to do is flush it 90% of the time this will solve this type of problem. You do this by using 1/4 strength nute solution, and twice the watering capacity. It would be a good idea to put it in low light for a day or two as well. If it seems to be recovering go to 1/2 strength at the next water, and then assuming all is well back to full strength.
I hope this is the information you are looking for, do you have something about this posted somewhere other than this thread? VV