Still fighting Yellow w/brown spots

Hey I merged these to make sure that your info was all together, like the coco medium for example.
Can you get a larger pic showing the plant(s) that those damaged leaves came off, including the pots and how they are situated in the room?

I would try to get your ppm around 800 and feed your plants for 20 min. Watch your ppm! If it rises then that mean your plants are using more water then nutes..if it lowers then that means your plants need more nutes!give it a try.. it works for me.. i have a ebb & flow and like to keep my ph at 5.8 =) goodluck!

Ok, stink and others...Im working on pics so we can proceed. brb

Ok, yesterday I added 300 PPM CalMag/water to each plant and about 3 days ago I made up a light CalMag spray (1/2 tsp / qt) and sprayed tops and bottoms of all plant leafs. The one larger plant (veg#1) Has started new growth an appears to be doing much better. I suspect that the affected leafs will not repair themselvs??? Would it be wise to add some domolite at this point or continue on with the CalMag with each feeding? Stink, I am unclear what you are telling me to do in reference with the CalMag? All of the "flowering plants" that I added 300 PPM CalMag to yesterday Are still growing at a unreal rate but I will need to wait to see the results.

1st pic> 2 month old veg to be mother plant
2nd pic > flower room
3rd pic> close up of plant put into flower on 11/28

Hi all. 1st off, thanks to everyone for the help! My problem was a severe case of Calcium defeicency. Had I stuck to what I knew worked and added dolomite lime to the Coco first, I would have averted all these problems. Since my well water is so soft...< 30PPM and I didnt add anything on this grow the plants suffered. I asked myself why I didnt add the lime on this grow and it was because since I was reusing the Coco I wanted to be sure I was starting with a fresh, clean substrate and I have read articles that you don't need to add anything to Coco. This would probably be somewhat true if my water had any minerals in it. It's a joke around here because on countless times I have took A PPM reading of bottled water someone just paid for and show them how unpure it really is. I am now curious if adding, maybe 100 PPM CalMag to my bubbler cloners would make my plants root any faster or grow more roots in the same amount of time. Since the plants I have been pulling cutting from, the cloner water, the fresh Coco I transplant from the cloner with and the Coco that the babies go into (1 gallon grow bags) is all defeicent, by the time the plants are in the 2 week of flower they were really showing badly.

A couple questions for the pro's:

Should I add CalMag to the cloners? and if so how much?

I am growing a short crop and only veg for 4 days. What are your thoughts on one gallon grow bags?

Thanks again to all who gave input...