Leaf spots? WTF!! I need help from experienced eyes, please!!

Ok heres the setup:
400 w HPS/ w cool tube
GH nutes+cal mag+h2o2 @ 700 ppm
Solution PH=5.5
Runoff PH=6.0-6.5

I just switched the kids upstairs to 12/12 last night- I know they are prob a bit small, but i want to get these cycled through fast for the next batch ( good ones are in veg chamber below)
I just noticed these spots forming on them over the last couple of days.
Anyone have any ideas how to fix?
Any help is greatly appreciated!
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i dont see any spots?

they look great!

look at the tips of the leaves, is just starting on those
Thanks for checking them out!

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Forgot to add - Tank tamp is 70F,
It rarely gets over 82F in the Black and Decker Grow Room .. er i mean storage closet....Thanks, Home Depot!!!

it could be many things i cant tell by the pic! take a close up of the spots.

Here are some closer shots..
Thanks again for the help !
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Could be deficiency of ... Calcium (Ca), Manganese (Mn), Copper (Cu) or Boron (B).
Could also be pH problems, this is commonly called pH spotting and shows up before some other nutrient deficiency appears, caused by incorrect pH locking out that particular nutrient (pH lockout)

Check the pH, if it's fine, feed with a micro-nutrient supplement (e.g Earth Juice Microblast). It's hard to tell what it is from the pictures, but whatever it is, it hasn't progressed very far yet.

Good luck mate.

P.S - Checking for insects with a magnifying glass is always a good idea when these sorts of problems appear.

if its rusty colored spots then its most probly a fungus. Type in rust fungus on google images and see if it looks the same as what youve got if so treat with a fungicide ie. Concern, copper soap fungicide