It’s still so early in the grow cycle, so I’d just toss any stressed seedlings and replace them.
I also use Rockwool & T5’s to start. I always keep some water, but not much in the bottom tray and leave the dome on for 7-10 days. I don’t poor water directly on the rockwool or spray the seedlings until they leave the dome. I just poor about 3-4oz of pH water in the tray bottom, let the RW cubes soak it up throughout the day until the tray bottom is nearly dry, then repeat...usually once, maybe twice a day. You want the RW cubes just moist, never soaked and never completely dry either. I use only one set of T5’s to start...the T5 dimensions are 23”x 23” until they’re a few weeks old. And if the seedlings quickly stretch, the light’s too far away. I then move them to a 6” mesh pot full of hydroton with the top of the rockwool about 1-1/2” from the top of the mesh pot, throw them in an ebb & flow system for a month, auto-watering 3x per 24 hours for about 15 minutes each time...then I switch to an RDWC & 4 x 1000w LED’s at 4-6 weeks...
The above method should provide complete uniformity to your entire batch of seedlings & they should all look about the same unless your mixing strains.
Here’s a pic of my girls I just switched over to my tent with RDWC + LED lights last week. They’re now about 6 weeks old and exploding!
Good luck!
