The curled leaves should flatten out once they're bigger

Thanks for the replies I appreciate it. These are my first peppers I'm starting from seeds so I feel like an overprotective parent haha

The #1 cause for pepper death is "too much attention". :)

I'll try not to baby them as much. Do you think the 24/7 lighting is too much?

I am not sure on the lighting. I have heard that a plant needs "rest" from the light but I am not sure that is true or not. Nevertheless, I see no reason to go a full 24 hrs a day. I personally would cut them back to 18/6 or 16/8 or something like that.

Yes, 24/7 is excessive. Try 12 on, 12 off.

Thanks I'll try turning the light off at night and see how that helps.

My lights are on a 16/8 schedule and it's working fine

Yep. Need darkness for transpiration and growth. I used to 12/12, but now I do 16/8--- helps keep the seedlings warmer during those cooler nights in mid winter.

Regarding the dome...though peppers love humidity, I'm thinking not so much during seedling stage since damping off is such a problem with peppers in their infancy. I've heard great things about rock wool for starting seeds and don't know if damping off is a problem with it, but I would remove the dome. Maybe some others who use rock wool will chime in and let you know if the dome might be a problem.

Kevin

What nutes are you using? Also, what kind of system are you running? How close are you keeping the T5's? Do you have any way to test PPM or, more preferably, EC of your solution?

The plants are still pretty young and I know you said you're running at 1/4 strength, but it's very easy over feed young peppers. Although, it looks more like a deficiency to me than toxicity. Depending on your nutes and pH, you also should be wary of calcium lockout. I may be wrong, but I believe a pH of 5.5 is on the acidic end of preferable calcium uptake. I've found my peppers do best with the pH around 5.9-6.3.

I apologize for all the questions!

-Randy

I've removed the dome to see how that plays out. I used a 6-4-4 liquid nutrient. The 4 T5s are about 2 ft away. I did not test the PPM but I did test the PH with a digital meter. The water I used was bottled water so I didn't think the ppm reading would be necessary. I only used that nutrient mix once. The two other times I watered them I just used bottled water with PH down solution to get it to 5.5. I watered them twice after to dilute the nutrients thinking that I overfertilized.

Lights should be about an inch above the top leaves. This has nothing to do with your problem, but will prevent the seedlings from getting leggy.

Agree with odsrandy about the pH. 5.8-7.2 is the acceptable range for peppers, but this one girl who used to post here with some of the healthiest looking seedlings had hers at 5. I have no idea how they produced though. Most municipal water co's deliver alkaline water for corrosion purposes, so if that's what your plan watering later on down the road with, try to shoot for low 6's to allow some room for error.

Kevin