I agree with the others.
Dumping and resetting your solution is a good idea. Make sure you add the nutrients appropriate order and mix them up good in between adding the next nutrient.
Also like I said, I’d shoot to keep ph at 6.2 and watch for them to rebound. Once they are looking good again I imagine you can start to target like 6.0 ph. You could risk doing like 6.5 for couple days to really ramp up the calcium intake, just don’t let it sit that high for very long. Sitting at 6.5 could fix the calcium issue and introduce another problem 
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Here’s a good example of mixing order and recipe by @peachfuzz I stole. She seems to know her stuff pretty darn well.
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Fyi , I’m a guy , but no harm in sharing my info…
Not sure if you have my flower recipe , but I can post it for you if you don’t… 
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@peachfuzz Shoot sorry man. As I was typing it, I knew soon as I assumed gender I was going to be wrong.
I would take any advice or recipe you can offer.
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At the dentist at the moment… but I’ll post when I get home or maybe tomorrow getting 2 root canals done…
Might just go straight to bed…
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So im still not sure if im battling a cal mag deficiency or a rust fungus problem… but last night i added a 3/4 strength dose of cal mag (12ml per 3gallon) and everything else was 1/4 strength… i added a pk booster for the first time and i diluted down to 650 ppm… last night they started to stink a couple hours after the change and this morning before lights out they were kinda droopy …i was scared i overdid it but when i got home they all were standing staight up Not like ive seen before so i hope theyre happy… if my meters on point they drank about 30-50 ppm… the 2 outside ones grew a bunch this last week and the one in the middles getting frosty and just growing buds…
Plants are creatures of habit — they know when it’s close to lights out and will naturally droop before bedtime.
In relation to have you fixed the issue, look for issues on new growth. If you aren’t seeing the issue on new growth then you’re probably ok. The leaves that had the issues, damage is already done and they won’t heal/repair.
Other thing is post some better high quality pictures close up of the issue so someone can give a better educated guess.
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Nice picture thanks. I still think it is calcium deficiency. Looking at your previous posts it does look like it has got worse if this is the same leaf as previous images posted.
I still hold that you should focus on new growth and other parts of the plant — are they also showing the same issue?
Tagging couple people to help get second opinions — @Covertgrower @BigDaddyCain @Not2SureYet @Nicky @peachfuzz
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Ya man its all the way up just not as bad as this… i hope it was just a ph issue or something… i think my ph was reading high… it was off by .2 on the 7…and the other plants ph was dropping down to 5.4-5.3 when the ppms got down to 200 and then started showing the same shit on a few leaves but not as bad…been quarentined the last week and got called out for a job starting tuesday so tomorrows the last day i can get a fungicide and spray em before next weekend…
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My guess would be a ph issue. With that much color. I let my ph drift out a little for a few days not paying attention. I have leaves like that right now too 
It happens. Just gotta get it back in range and march on 
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Calcium issue
But yeah PH has to be in range.
I also have it right now, @Not2SureYet, the girl Just showed me ughh only issue with not being home and the plants on cruise control.
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Well fuck thats a bummer but good to hear im not alone🤘 @Not2SureYet @Nicky shits been stressing me out cuz everything ive read says calmag or rust fungus but shit looks exactly the same and im not trying to cut off every single fan leaf ya know😳 but was about to:P
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One other thing, What is the TDS of your starting water? Having my water to high killed my first grow when I was learning. I found mine here is 525 or 535. But way to high. Once I changed to RO. My issues disappeared. Also, you have to watch the curse words in here as a heads up
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So im passed the half way mark! theyre 7 weeks from sprout here… i changed the water and diluted down to 520-550 ppm for week 8! The one on the right stretched like crazy this week! the one in the middle stretched on a few bud sites and is getting real frosty… the one on the left grew a bunch too even though it went through hell with that cal mag issue! hoping all the stress i put them through dont mess with the bud developement too much cuz im happy with how big theyve gotten and how many bud sites im seeing!
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This guys normal and will thicken out right? Just wondering why the pistols receded… im all paranoid about pollen sacks… no bananas or anything just have never experienced bud developement and dont know what to expect @GreenJewels @BigDaddyCain @Covertgrower @Familyman @Not2SureYet @Nicky @Deepsix @peachfuzz @Mote @OhHeyThere
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I plucked off a calyx to see if there was a seed thats why theyres a gap in there too fyi🙁
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It looks like she is about finished. What do the trichomes look like 
How many weeks are you into flower? That will give you a heads up too
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Agree with @Not2SureYet almost done. The pistils will recede when ready.
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