GBW, sometimes plants just aren't healthy and you have to ride it out. My AKR has had similar issues for weeks now, and my pH has been perfect. Some extra calmag and bloom nutes has helped a bit, but the fan leaves continue to slowly die off. My other plants have not had any of the issues, so I know it's not environmental. And AKR is known to be a temperamental strain anyway, & you can find lots of grow journals where people chased problems from beginning to end. I would suggest giving the lime some more time to work, since you can cause a calmag toxicity if you keep adding more and more. If you're around day 50 then you've got plenty of fan leaves to get you through to the end. Just remove them after they die off and let the plant flower as best it can. Not every plant & grow will be perfect with maximum yield, but that doesn't mean you won't get some primo meds out of it.