LED-induced nutrient issue on 37F Northern Lights & Carnival MoC

Hey folks!

Does this appear to be a case where too-close LED caused the plant to take in an excess of nutrients (light stress induced nutrient burn)? If so, is there any action that should be taken to fix this? Should I expect to see improvement? Any other noticeable issues?

Attached I've got pictures - the first one is from day 35 of flower and there appears to be a worsening of the issue on day 37.

1) 35F, C on the left
2) 37F C
3) 37F NL
4) 37F, C on the right

u need closer shots of the tops without any purple lights on to see the colour
also perhaps one from the side so we can see how deep it runs

below are several more images from F37

weed-whacker said:

u need closer shots of the tops without any purple lights on to see the colour
also perhaps one from the side so we can see how deep it runs

Click to expand...

added more - it's pretty much the extent of what I can get as my plants are in lights-off at the moment.

doesnt look like led bleaching to me

hopefully other chime in

weed-whacker said:

doesnt look like led bleaching to me

hopefully other chime in

Click to expand...

Well, I had the light too close for a while but it's been at least a week since I moved the panel 18" away. If the LED's too close, don't the plants take in more nutrients than is necessary?

crushing_self_doubt said:

Well, I had the light too close for a while but it's been at least a week since I moved the panel 18" away. If the LED's too close, don't the plants take in more nutrients than is necessary?

Click to expand...

Looks more like a ph issue in coco or hydro to me. Also looks like lights were too close at one point by the light green leaves, but they should come back fairly quick after raising the lights. I grow in coco, and have seen the same thing....was always due to ph swings, due to a shiity/bad meter.

eastcoastled said:

Looks more like a ph issue in coco or hydro to me. Also looks like lights were too close at one point by the light green leaves, but they should come back fairly quick after raising the lights. I grow in coco, and have seen the same thing....was always due to ph swings, due to a shiity/bad meter.

Click to expand...

I watered with nutrients just 3 days ago and the run-off was ~5.0 but I don't have an exact reading because I use the liquid version. I am worried it's pH swings, too. But I worry addressing too much at once might screw me up further. I'm so close and I don't want to blow it.