have 8 plants been going good then four days ago I noticed bottom leaves rolls ng up and inward then crispy.
Now two of them look bad.
I pulled them out. But worried.
Pic 1 first plant
Pic2 second plant
I am watered last night, look so worse.
Pic 3,4,5 are the others plants
Pic6 did notice this on the leaf of healthier plants.
PS did use a foliar spray Cal mag + b1 pH 5.5 twice a week, last done 5 days ago.
Any advice, greatly appreciated.
What kind of soil are they growing in?
The marks on the leaves appear to be a residue left behind from nutrients that were not TDS (Totally Dissolved Solids). Spraying your plants with salt based nutrients is not recommended. Hope this helps. Happy growing! 
@BornHigh420 does have a point. Clear out your sprayer and try a foliar spray with fresh water to rinse the salts off. Don’t do it with the lights on though. Welcome to a great forum 
Not sure was given them, good drainage
Thank you for your input
Ppm 980 pH 7
Your in soil or coco?
If your in soil you need to be getting a ph of 6.5 range out. If your in coco it should be in the 5.8 to 6.0 range
I m flushing today,
