Howdy! Nice looking plant, some really nice tops coming in. Sometimes a deficiency is not the absence of the nutes, but rather a blockage or lockout happening. Check the pH with a slurry. I am guessing you are probably sitting at about 5.8???
If you ARE staring at a high EC/low pH reading, a good heavy watering (not a flush) will dilute down the salts and take the pH back up to a healthier number. The technique I use is I sit there with a watering can and an EC/pH pen and I take my time pouring small amounts until the numbers look better and stop. Take your time so as to avoid losing microbes, nutes and buffers out the bottom, and do small increments because once the number gets in range it can drop back out with a low EC / high pH reading as the excess water continues flowing out the bottom.
On a side note, there was a dry amend I used once at recommended strength and when the leaves started turning yellow and getting brown spots I tested and got an EC reading of 9999999
