Shagrathanswered grow question 4 years ago Hi!
I'm not sure what is the question here but if you are referring to those purple stems, I'd say it is the result of led light exposure and nothing to worry about.
If you look at most of the led grows you can see that they have purple stems where it gets lot of light.
Purple stems can be caused by many other things too but if it is the only symptom there should not be too much to worry