Please help me diagnose this issue

So i just checked the PH and PPM

Feed: 30 PPM / 6.52 PH

Runoff: 1112 PPM / 6.42 PH

Thanks for the feedback :)

Plants stopped stretching at the end of week 3, its now the end of week 5 so for at least 2 weeks the distance and PAR have been the same (in not going over 850 PAR)

But i did noticed that the branches that are closer to the light seem more affected, the branches at the sides of the tent seem healthier, So im going to increase the distance a bit just to be on the safe side.

Maybe a maximum of 750 PAR, what do you guys think?

Yes, just on the top ones.

Thanks for getting back to me. Yes i do have one now and will check this and report after the next feed this monday :)

So i just checked the PH and PPM

Feed: 30 PPM / 6.52 PH

Runoff: 1112 PPM / 6.42 PH

I used Distilled water so PPM going in was very low this time, but i usually feed them with advanced nutrients lineup at 50% fo the recommended dose which comoes up to 1000 to 1200 PPM. Should my runoff be the same, whats the ideal point here?

Again thanks so much for your advice

@atnupacas The PPM going in won't always be the PPM of the runoff. The 1112 PPM that you mention should be ok for flowering but some phenos want more. I sometimes go upwards of 1600 PPM when in flowering. On another note, reading how you say it's the top of the leaves only makes me suspect it's light burn. I'm glad to see you increased the light distance. That may very well have been it.