PH levels

[PLreef]

I got a question about ph and run off ph. I have a few autos growing in nectar of the gods soil, 5 gallon fabric pots. I had a few issues early on when they were seedlings due to over watering. Now they are in week 2 of flower and they look amazing. Super bushy and full of bud sites. Just under 24". Really happy with them!
I noticed a little yellowing in the leaves. After some reading on GWE main site I believe it might be a magnesium issue. I use Tecnaflora nutes at full strength. The water going in is at PH of 6.5 to 6.7. I checked the run off the last 2 waterings and it was at 6.2. Would raising my feed water PH help with run off PH? Or is there something else I could do to raise the PH at the root zone? Thoughts? Thanks in advance.

[PLreef]

Here are pics of the leaves

[crucialbunny]

There are a number of strains that have leaves that will pale during flower and bud. I don't have much experience with autos but assume that based on their genetics it would still hold true.

[homegrown]

If your last two run-off checks were 6.2, sounds pretty safe to me. I wouldnt change much...You could try bumping your next water/feedings up to 6.8-6.9 if you wanna try and bring your output closer to 6.5. I wouldnt fart with it too much. Plant looks good,

[MeEasy]

Most of the time ph fluctuation in runoff is caused by unused nutes or I'm sure you've heard it called salt buildup. Myself I would try watering next time with ph closer to 7 to see if it corrects the soil ph if it stays down I would flush em on the next watering to clear any buildup. They're looking healthy 4sure.... good luck

[CaptainWiese91]

6,2 is not bad for a run off water ? I don’t see the issue here ??ine I constantly on 6,2-6,4.

maybe you have discovered an early stage of mag deficiency. But I guess you have a cal mag supplement ?

[PLreef]

I do use cal/mag. I thought that maybe the low root zone PH was causing the plants not to be able to uptake it.