My plant is turning yellow!

I need help! We have beautiful broad leaf seedlings 10 days now. Most have been good, however 1 has always had some yellow in the center and the others were green but are yellowing a lil now. I thought I adjusted nitrate and molybdem to stop yellowing. One plant I noticed is getting greener however several other are getting more yellow.

Take a look at the pictures. The 1st is the one that has been yellow the longest and the lightest of them all. The second is a pic of one starting to yellow. Take note to the others in the shot that are all green and they all are in the same nutrients.


FYI I only placed 2 teaspoons of flora micro in to 13 gals of water. I wasn't sure how much. If this is the problem and I need more please advise.

Thanks
EZ duzit

Looks like sulfur or iron deff.

IDK, but thats weird. I would try just srtaight water for a litle and see what happens. It might help identify the problem.

how long should you flush if you have nute burn!

Looks like sulphur deficiency to me, but I've been lucky enough to not have problems with nutrients so far (touch wood) so I can't speak from personal experience. Have a look at this https://www.rollitup.org/view.php?pg=faq&cmd=article&id=36 and some of the other articles in the FAQ.

this time i did not gif them any nuterian,just water i have gorwn many times befor so i dont under stand it this is my second time i got f up plants 1 time i used nuterian but now just water.any one know what im doing wrong??