I am growing 2 autos in dwc. Seed are from ilgm. It is under a marz hydro TSL 2000 @ 22 inches. I use the Flora trio with cal-mag and hydrogaurd. 3 days ago I noticed some leaves were not all green. Only the new growth. I checked everything. Ppm was 900 and 5.9 ph.now it looks bad. I turned the light down to 75%. I did a bucket clean and gave them last weeks feeding schedule. And I went out and bought distilled water. Instead of my tap water that I de chlorinated. I think I may have an iron deficiency. And I noticed some light burn.
So I have a few questions? Should I get rid of the bad leaves? Has anyone else delt with this? How did you fix it and can it be fixed. I think I just started to flower also. What timing right. I recalibrate my ppm and ph pens for good measure. Let me know smarter people then me if you need more info. And thanks