So Close to Harvest yet problems have started

[SavannA]

All the plants look a little sick and I'm hoping someone can tell me what my issues are based on the photos.

The plants were planted in a 70% soil 30% perlite mix. I flipped to a 12/12 light cycle on the 2nd May to tell the sex.
I have been feeding them every second watering with nutrients (images of nutrient attached). I started to suspect over watering so I water 5 days before doing my last plain watering.

In the past 2-3 weeks I have started to see the issues in the photos and it is only getting worse.

One plant's top leaves are yellowing, crispy feeling and show major tacoing along with all leaves starting to yellow. There is also minor signs of leaf tip burn or clawing. Also some leaves look a little deformed.

The last two waterings I tested PH run off with my crappy Chinese PH pen and the run off PH levels were between 6.8 - 6.9 which I think is a little high but shouldn't be causing all these issues? I have been trying to adjust my watering PH to about 5.9 - 6.0 in hopes to lower the run off PH to between 6.2 - 6.5.

Should I not be watering at 5.9 PH? and just aim for a 6.2?

Please help!

 

[GNick55]

looks like you got some light stress (light to close or power to high), signs of watering too frequently, and should be feeding every watering

 

[SavannA]

looks like you got some light stress (light to close or power to high), signs of watering too frequently, and should be feeding every watering

Thank you for the information.

I will skip my plain watering sessions and feed every time. There should only be a couple more sessions before I start a couple of weeks of plain waterings before harvest. I also thought there might be signs of over watering but was not sure.

Should I continue trying to lower the PH run off values or just stick to a specific PH value when feeding?