Please help me with my seedlings

so i have 3 seedlings that sprouted 3 days ago. they are in rockwool and i have a T5 light about a foot above the seedlings. my problem is within the last 6 hours the leaves(not the round ones but the pointed ones)are starting to curl up tight and turn brown. one of them is even starting to droop now. i have them in humid dome right now and am not sure if should take it off yet. i am afraid they are all gonna be dead by the end of the day. what to do? please help. thanks

Are you watering them?

yes the rockwool is moist.

are you adjusting PH?

You can submerge the cubes into water three or four times daily. Use a very weak fertilizer solution, 1/6 of what it says for dirt. You can soak the rockwool cubes(with the plant in it) every eight hours for fifteen minutes.

using distilled water so i shouldnt need to adjust it right?

check out this thread...https://www.rollitup.org/marijuana-plant-problems/150004-plant-moisture-stress-symptoms-solutions.html
prolly find ur answer there.

coombaya said:

using distilled water so i shouldnt need to adjust it right?

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You will have to use a small amount of ferts. I go 1/6 of what the fert label reccommends for dirt. Shake it well to oxygenate your water before watering. Like I said, you can submerse your rockwool for 15 minutes every eight hours.