At the beginning of the week, there were signs of potassium deficiency, I added 100ppm PK13 -14, but the deficit progressed, so I increased it to 300ppm.
@Superstuff, I have soft water of 60ppm, I add calMag to 200ppm, I thought it would be enough... okay, I'll try a new solution with 280ppm today, let's see how it reacts) thanks for the hint🙏