Not really sure what is going on? Maybe a PH problem

They are about 12 days from sprout.
They are auto pounder and then a UFO auto called green poison.
They are in Fox Farm Ocean Forest and are watered with plain water(no nutes).

I ruled out over-watering as I am very careful with how much water I give.
I don't think it is heat stress as I am using 8 CFLS with two computer fans.
The PH of my water is shown below. Doesn't look too bad. 6.5 - 6.75 or so, so a little high maybe.
I have not tested the run-off yet as I need to wait to water them again.


They were looking fine but this one started showing problems about 2 days ago. Auto Pounder


This one is doing much better but may also be starting to show some issues. There are some little white dots which I just saw today. - Green Poison


The setup


Any help would be greatly appreciated!

Just a little bit of nute burn, not anything to worry about. Id suggest next time getting a soiless mix and putting a 3-4" layer on top of your FFOF for your seedling to grow in, seeing how hot OF is. But like I said nothing too bad going on there.

FFOF is kind of hot for young plants I am reading... And it looks like nute burn so there is your answer. Any perlite in the mix?

I think you're right.
I used to use light warrior then transplant in to OF about 4 weeks in. This time around I wanted to not transplant at all so I went straight OF.

No extra perlite in the mix either on this one.
We will see, hopefully as they grow it won't be a problem.