JBC420 two of those plants got beaten up or something. they took physical damage. thats why the shock and bad reactions like yellowing.
Sense do you have anything with B vitamins in it. superthrive, vita blue, b52 andvanced nutrients or even seaweed.
though your typical liquid seaweed is mostly devoid of vitamins due to the manufacturing proccess. fresh seaweed is awesome once rinsed of salt and chopped up. just an idea if your ever growing near the coast, lol.
generally when something like this happens, you got 3 choices dpending on whether your suzi homemaker with all the time in the world or entrpeneur of the year, lol....just keep an eye on them and hope they pull through 9they may never keep pace with the healthy ones from now on) roll your sleeves up and hit them with everything you got to remove shock and get them growing back on track...or finally if your ruthless, rip em out and use the pots for new ones that will catch up and over take shocked and damaged seedlings...;0