1. Over Fed (seaweed?) 2. Burnt? Cauliflower.. 3. ...

I looked through your diary and she was going fine until you did the big defoliation then she started showing signs of heat stress. The light being close for them few hours definitely didn't help. So long as you can get your temps on track she should be fine. Remember when it's hot the plants take more water then nutrition.

I was planning to use Hydrogen peroxyde as well but I read only in very low amount because it can harm the plant more than it benifits with the oxigen. It’s basically like a killig agent for microbes and bakteria (or anything living) so i would be very mindful about that. What i‘m seeing is a clear indicator that one of your immobile nutriens is blocked and especially it looks like calcium deficiency. So without looking at your nutriens I would say it’s that. But this deficiency can also happen if you have too much Phosphorus in your media because these two elements „compete“ against each other. They are differently charchged. So if your P is above 90ppm (mg/L) I would dile it down more. Good luck :)

I run with 0.2ml/gal Clorox every three days. Roots golden and easier to source if you are in a bind.

Burning from over feeeding.........haze type plants need half strength ferts.

Depending on the size Of pots used, flush them 3-4 times in a row with water 4-5 days. To clean the media. Might have to cut more holes for water , air flow to prevent drowning. No one likes to transplant this far in but it is always an option. Flushing has helped me a lot , be sure to get extra air flow to dry media as fast as possible or drowning may occur.

Calcium excess ?????