Please Help Me Fix This Unsightly Deficiency?

Strain: Norther Lights
Light: 400w HPS
Grow Method: 3 Gallon Bubble Bucket

Nutrients:
Flora Series
8ml/g Micro
16ml/g Bloom
10ml/g CalMag+
3tsp/g AquaShield

So I started a Northern Lights mom from seed and from the onset she exhibited the same leaf degradation issues as in the pics below.

The pics are of clones from the mom and are currently 4 weeks into 12/12. The flower pistils are nice and white and getting thicker by the day, but the big fan leaves arent and havent been doing so well. They start out nice and green and looking healthy but eventually form little brown spots that grow larger in size and number until the leaf looks entirely burnt.

When I started the flowering phase I will admit that I neglected the plants by changing the reservoirs once a week but not topping them off regularly or re-adjusting the pH. I would start off with 3 gallons per res at 5.8-6.0 pH. By the end of the week each res was low as hell and the pH was down in the 4s. Needless to say, the leaf problem progressed quickly making me think major nutrient deficiencies.

So after one week of seeing this I decided to stop being a lazy ass and started topping off each res every 1-2 days. I also started re-adjusting pH as needed. However, 3 weeks later with a steady pH of 5.8-6.0 in every res, with res temps never eclipsing 75F, the leaf issue still plagues my ladies.

The mom, on the other hand, is a freaking shrub now and does not display the issue as prevalently as the clones. Does anyone have any idea as to what this could be? Everything I have read with pic comparisons points to Cal, Mag, or phosphorus deficiency. That is what prompted me to double the recommended dosage of CalMag+ per gallon from 5 to 10ml/g.

The room temp never tops 81F and humidity never tops 50%.

Any suggestions? I am somewhat content in dealing with it as long as it does not effect the overall quality of the finished product. But still, who likes looking at a plant with fugly leaves, I ask you.

Looks like maybe you have a calcium def. Check out this link and see if it matches with your situation: http://www.growweedeasy.com/calcium-deficiency-cannabis

Since it hasn't been very long since you stopped ignoring the babies and started trying to correct the problem, you might want to just give it some time and TLC. Don't overdo the corrective action; sometimes we tend to be impatient. Nature has a tendency to make corrections with only minimal help from us. But you def can't ignore them. Watch closely for signs of new growth and pay attention to how healthy the new growth is (or isn't). That will be your best indicator of what is happening now that you've made some corrections.

It's looks like a calcium def., probably from the ph being too low.

looks like cal to me, also. GL

i guessed calcium deficiency too. good luck. let us know how it turns out--because who wants fugly plants?!

Thanks guys. I am monitoring progress and will report back after a few days to a week. That way I can see if the problem improves.

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foliar feed them with the calmg at 3ml/gal.

Ok I tried something tonight that I have read about a hundred times but never did. I actually removed the neoprene collars and flushed the plants. Low-and-behold there was visible salt build-up on the tops of the hydroton. I flushed each 5 in net pot with 1/2 Gallon of RO water and about a gallon of regular tap. I posted some pics below of the two shorter plants having the deficiency and their taller counterpart, which is not. All of the seeds came from the same batch and seed bank. Kind of puzzling.........

I am hoping this will help speed up the recovery process. I am going to flush once a week from now on when I do res changes. Time to cease the corner cutting for the sake of a supreme crop.

Now as for foliar feeding. Purple, I have read about it but never actually applied it other than to clones with plain water to keep up humidity. See this is only my second grow and the first was from bagseed, which did not seem too temperamental. The unknown strain did pretty much what I read pot should do when growing. However, this here NL seems a bit more prissy. Therefore, if you dont mind, I have a few questions for you seeing as how it sounds like you have first-hand experience. And thanks in advance:

1. Can I foliar feed during flowering because I am at the tail end of week 4 of 12/12?
2. How frequently should I apply the feed?
3. Should I apply with lights on or of?

Many would say you can't now. I don't. Just spritz lightly and avoid budding sites as you can. I like to hit them before lights on.
The thing is that you trying to avoid mold troubles.
2 times a week.....

Now then, your practice of lackadaisical pHing is what brought this problem on. You know what the range is,,,,,,but you must keep it there. Low pH is worse then high for the plant in a time to damage relationship.
The flush should help out, but you NEED to keep the pH in the zone by adjusting every day at lights on.