Deficiency?

I use Organic soil the last 3 yrs and ph is always 6.8 even 7 sometimes, raise your ph to 6.5 to 6.8 id say you will have better nutrient uptake once the ph is sorted, and dilute your nitrogen to half strength and give a good soak and leave for 4 days or so 👍🏻,, worked for me before,, hope ya get it sorted bud 🍀

Whilst I do agree with you that PH is not as important in soil as hydro etc, if it's too low it will still lock out the plants ability to absorb specific nutrients, and 5.5 PH is very low for soil. NPK and Calcium uptake all start to diminish below 6.0. I agree with @GrowingGrannie that this looks like a nitrogen (yellowing) and calcium (yellowing, browning on the veins) deficiency caused by low PH. You could potentially try a calcium-rich foliar spray to attempt a bit of reversal, but it looks like you're quite far into flowering so I probably wouldn't bother at this stage. Just up the PH in the pots and that should stop the spread. There is a decent graph available here showing the lockout levels of most elements in cannabis - https://fluence.science/monitoring-ph-for-cannabis/. Hope that helps!

So I've tested my runoff and I'm getting low ppm numbers so it is absorbing food. Think it's a ph issue because of that. I'm growing in living soil so ph doesn't have to be right on.

Your pH is way, WAY too low for a soil grow and the nutrients it's really needing are not available to the plant... you're giving the proper nutrients, the plant just can't get at them. Get the pH up to 6.3-6.4 and she should start to look better and BE better. The damaged, yellowing leaves will not get better, they will not get greener - but any new growth will start to show you that you've cured the problem. What is specifically deficient here is calmag so an extra dose of that, after you've raised your pH, would be a good thing. You should also be giving her some extra P and K ... if you're growing organically, you might want to give some bonemeal for the P and some Langebeinite for the K.... it's hard to overdose on those nutrients ... when I grew in soil, I never had to use bonemeal but I did use Langbeinite and the way I used it (since it doesn't dissolve very well), was to top dress 1 tablespoon of the crystals once a month throughout the grow. Good luck... and get that pH up quick time!

Soil grow?