What's Wrong?

I have been having this problem lately. Growing ebb&flow using well water with TDS of about 75ppm, no nutes yet. Seeds sprout and grow about 1 inch high and then the leaves start to yellow and wither. I am lost. Check the pics and help me out.

What's your ph?

Also that rockwool looks too wet, but i dont have much exp in e&f

It's likely the PH.

What kind of lighting are they under and how far away?

Bud Tipps said:

It's likely the PH.

What kind of lighting are they under and how far away?

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They are under flouros and PH is 5.5-6

What kind of flouro? Are they getting enough light?

Maybe try adding a small amount of nutes and see if they improve? Like around 200-250 ppm.

It seems they should be healthy this early on.

Is the temperature good? There is airflow in the room?