Ever seen this?

[Toppers]

This seedling has all this spotting...wtf?

 

[GrowTech]

how close are your lights?
whats the pH of your soil?
are there any nutrients in your soil?

what's going on?

 

[demonds1]

That looks like nute burn.

Check out this chart, it looks like the pic they have.

http://www.drugs-forum.com/growfaq/97.htm

 

[Toppers]

how close are your lights?
whats the pH of your soil?
are there any nutrients in your soil?

what's going on?

PH is 6.8

CFL's are 4" away. There is a 'tiny' bit of horse manure in the mix, maybe 10% by volume.

All the other seedlings look fine, this is the only one with these spots.