critical leaf issues: brown & yellow spots, blisters, dying (PICS + questionaire)

It might be symptoms of late blight. Earlier on the leaves were exhibiting symptoms of such, and were foliar fed with baking soda and water. That seemed to help a little bit, but after still showing signs I began foliar feeding with a light mixture of 5ml/gal calmag+. Still, issues are not letting up.

You are all very wise, and hopefully we can come to some sort of diagnosis together. Most of the symptoms the plants are exhibiting are similar to others on the forums, but blight/calmag defficiency treatment does not seem to be doing the trick. Any advice would be tremendously apreciated.

How long has this problem been going on? Several weeks
What STRAIN are you growing? Serious Seed's Chronic
What was the establishing technique? (seed or clone?) Clone, rapidrooters
Were they in the same mixture when they were seedlings/smaller plant? Switched from DWC to soil because air pumps were too loud (if you have a solution please inform me!)
How Tall are the plants? 1 foot
What PHASE (seedling, vegetative or flower) are the plants in? Veg
What size pots are you using? (Include how many subjects to pot) 7gallon
What substrate/medium are you using? Fox Farms Ocean Forest with 30% perlite
What brand Nutrient's are you using? Botanicare's CNS17 and CalMag+
How much of each nutrient are you using with how much water? ~800ppm, 100ppm from tap; 5ml/gallon calmag
How often are you feeding? every other watering
What is the pH of the "RUN-OFF"? 7
What method of pH test was administered? Using Strips? pH pen? pen, cheapest available
How often are you watering? every other day
What size bulb are you using? 600w covering roughly 4'x6'
What is the distance to the canopy? little over 1 foot
What is your RH Factor? (Relative Humidity) 45-55
What is the canopy temperature?
What is the current Air Flow? (cfm etc.) don't have intake yet, waiting until plants can handle the natural gas water heater exhaust
Is the fan blowing directly at plants? yes
Has plant been recently pruned, cloned or pinched? just fimmed ~4days ago, slow recovery and brown calluses where the plants were cut
Are plant's infected with pest's? possibly botritus blight/gray mold

from what i can see heat stress are your plants worst close st to your fan,looks like you blowing hot humid air onto your ladies. your ph run off need b more like 6 than 7

Generally in the past when I have found I have a plant that is super sensitive to heat, feeding, watering, temperatures, foliar feeding etc, and reacts terribly to any shock, that generally indicates the plant has some form of disease. What are the temperatures in the room at the canopy top, and what is the air temperature in general?

looks like could be a couple of things :drop your ph down to 5.8-6.0,lighten up on nutes to about350 to 400ppm,change direction of your fan so its blowing from up under, rather than down on,from the pics it looks like nute lock correcting your ph will go along ways,flush with straight water,correct your ph,and no nutes for a week,if the ph isnt right it will not take any nutes,back your lights up a little,check your water temp,air temp,same thing happened to me,like i was told "you cant rush em "

Dropping your pH to 5.8 or 6.0 in soil is a death sentence. Let it stand as something Med4u just said...

Soil pH should be between 6.5 and 7. Sounds like you are okay... but then I see those plants and all I can think of is pH damage.

Is it possible you are using an acidic nutrient solution on occasion which is skewing the levels in the soil from time to time?

Either way, I think the stress from transplanting into the organic soil from salt based hydroponics is the issue here. It is going to take time for the plant to adjust from the old system to the new one. Figure, if you are what you eat, then the plant was 5.8 pH water (mostly water). Then you move it into a 6.5 to 7 pH system. Now it is getting water at a different pH and having to balance where nutrition comes from. During this time there might have been some issues... I think that should be expected.