woah, grow room to hospital, HELP!!!!!

Woah, ok guys I'm growing 2 auto flowers using aeroponic bubbler system. My large 10 inch tall plant is 4 weeks old on the dot, the younger one to the left in the pics is about 3 1/2 weeks old and just 2 inches tall (It hasn't grown an inch in at least a week.)

Used 1/4 str FF grow big from week 2 til now (worked fine)

So everything was going wonderfully for 4 beautiful weeks of my first grow, one of my plants really took hold and skyrocketed, I actually think it is way ahead of schedule.
All the research I've done, money put into it, page of page of postings on here and then this happens to me over the course of 2 days!

Suddenly I woke up one morning to check my preflowering large plant and dress up her hair a bit to allow for more light penetration and I had fucking leaves crunchy in my hands, legit crunching into nothing. There was huge purple spots on the leaves and a little on the top bud and the following day turned orange and started to become crunchy!

I ordered cal/mag before this even started happening and USPS is taking its gd time. I also ordered big bloom I feel like my plant is a early finisher and wants the big bloom nutrients and phosphorous. I feel like it has a NASTY NASTY Cal/Mag Def because the water I have Ph's out of the faucet at 7.0 and is almost completely pure as it is a well, I didn't know this and haven't been adding cal mag to my water until someone saw that I was getting a def. My plant was gorgoeous and has since turned into a monster! USPS wont have my cal/mag, FF/ Big Bloom until Monday, so I added a blended mixtures of coral calcium and Epsom salt to the res.

I think its a combination of Cal/Mag Def and Phosphorous def but how can I hospitalize her while I wait for my Big bloom and Cal mag on monday, she looks worse in person than in the pics, I've been misting them a lot to keep from crunchyness but I doubt that's good since the leaves seem a little droopy. Please don't give me shit criticism about me being a moron just please help me with my grow, everything was perfect until about 3 days ago, awesome green leaves, little brown scarring but nothing major, now shes like the exorcist.

1. is my large plant saveable? How can I treat her? how the F*** did this even happen I was so happy about that plant!

2. Is there reason my other 2 inch plant being 3 1/2 weeks old will not gain upward growth, it seems to have 2 nodes, Its not AS effected as the big plant from cal/mag def, but a little on the under leaves. Is she just mega stunted from the big one taking all of the little calcium they had available or is there something else at play here? Im feeding her 1/4 str FF Grow Big.....

So, QUestions in a Nutshell.

Will big plant produce buds still if I treat this? How do I treat it?

Why is the small plant (being only 1/2 week smaller than large 3 week old plant) not growing and shooting upwards? is it just too early and my other plant was a quickie?

The 1st set of pics is the yellowing leaves and horrible look it is today, the other two pics are from 3 days ago.

Please help!! D:

Have you been checking your pH in the reservoir on a regular basis?

Hiya Tyrantecks, I'm Soil/Compost grower so canna really Help, I don't know owt about aeroponic bubbler..but have you checked to see if you have any problems or issues with that? pump/air stone, algae build up? IDK...bet someone will pop along who has seen these symptoms before...

Hope you sort mate.

PEace

Thanks for your feedback guys, Yes I do, I keep it at 6.0 give or take .1, I know i've seen cal/mag threads that look like this I'm just so surprised it took such a fast turn from somewhat scarred brown spots to just straight up 50% junk leaves (the top tier isnt as bad as the other 3 tiers). I know its a combination of cal/mag and phosphorous def, could it also be that I'm not giving the plant enough grow big? grrrr I just want my mind put at ease, I was planning on a much larger grow for my second grow and make a real legit box for it but I wanted to make sure I could pull this first grow off before I invest to too much. All this to have a cal/mag deficiency because I don't use town water could be the make or break, what a shitty thing.

Again Im adding cal mag and am thinking about adding big bloom since there are so many pre flowers, I feel like the big bloom will at least help that along. My stem is beautiful green, nothing is effected but the leaves. This sucks.

also, Idk what to even do with the small plant, its 3.5 weeks old and only 2 inches? is that normal for an autoflower, the root system is huge and looks great but its just not gaining height, I think I even see a pre-flower on it.

someone helppppp!

I've not even started my Auto's off yet but I think(could be wrong) that you right about it being small/short..esp for 3.5 wks..most finish after 8wks(Read that as maybe 9-10..as times stated on Grow Sites are from Grows using the best Kit/Setup) But does seem kinda short for the length of time she been growing...kinda like she spent most of Her time putting out Roots?? maybe she will shoot up?? IDK. what sort Light/Lumens amount is she getting? what about swapping ends of the RubberMaid around(I mean the whole container) So the little one under the most Bulbs/Light...judging from Pics.

Peace

EDIT: I thought some other Hydro Guys would been along by now? mind it is still early in some parts of the World...Prob still @ Work OR in Their own GR checking on Gals..

Diagnosing plant issues has never been easy for me but I find this chart very helpful.
Also you may be better off to repost your question in the plant problems thread.

To me it's a pH related problem.

https://www.rollitup.org/marijuana-plant-problems/

Yeah I hope someone comes along... I know for a fact its cal/mag def but possibly something extra as well. I need one of these dudes to let me know whats going on so it doesn't just straight out die! I honestly dont care so much about the small one but I need to save my big girl so all this is for not. even getting a half is better than nothing at all, Im gonna buy PPM meters and PH meters on my next grow, no more of these bullshit strips and PH test kits, she was FINE! then I think she went to transition into her flowering period and didn't get some of the nutrients or something that it needed to make the transition. I just need a ganja god on here to come tell me whats up, literally just crumbled off 1/3 of my plant, can like barely see the stalk now, I mean I think its either close to done with veg growth and transitioning into flower so does less fan leaves mean less buds?

That chart is helpful, to me it looks like a late stage potassium def? whattt?

Yeah I hope someone comes along... I know for a fact its cal/mag def but possibly something extra as well. I need one of these dudes to let me know whats going on so it doesn't just straight out die! I honestly dont care so much about the small one but I need to save my big girl so all this is for not. even getting a half is better than nothing at all, Im gonna buy PPM meters and PH meters on my next grow, no more of these bullshit strips and PH test kits, she was FINE! then I think she went to transition into her flowering period and didn't get some of the nutrients or something that it needed to make the transition. I just need a ganja god on here to come tell me whats up, literally just crumbled off 1/3 of my plant, can like barely see the stalk now, I mean I think its either close to done with veg growth and transitioning into flower so does less fan leaves mean less buds?

I assume you control your pH, and since you only used 1/4 nutes, it must be a cal-mag def.
Not sure if they were survive or produce much, as they look really bad.
Dr. Jekyll

Also looks like heat issues, pic 1 & 2 show temps of 37C & 38C, (97F & 100F), and that's on the floor!
So why so hot when you only have a few CFL, did you forget about air ventilation?
Mr. Hyde