Leaves turning yellowish - brown spots! Help!

Hey guys, one of my seedlings is turning very pale, and developing brown spots....I thought originally that maybe it was because I misted it one day while the lights were on and it burned the plant, but I've stopped doing that all together and it seems to be getting worse!Any help is greatly appreciated!

it looks like some sort of deficiency. you might want to search in google plant deficiencies and find a guide to figure out your problem. get the growing bible will give you some very basic general knowledge on plant issues.

That would be a nitrogen deffencey buddy....chevk the forum guide todeffenciey....your awnser there

sorry....itz called a guide to deffencieys/toxicity...in the marijuana plant problemz section

if you not messing with her id say itz one of two problemz.....you p.h is offf causing nute lock....or you have crappy soil...that be my guesss

Could be a number of things. Whats your soil, Nutes if you used any, light, temps, watering, Ph? Need more.
But Id say its N def since its so yellow.

I'm using Pro-mix, 70% sphagnum moss, perlite, limestone. I'm watering with 6.5ph water from the tap (after sitting for 24h)...

I just mixed a really weak solution of 10-6-1 bat guano and water and fed the little ones... we'll see what happens in a few days.

K that sounds like it might help...Also though check your moisture It looked like in the pic they were a bit soaked. That will make them look sad and won't take up nutes well.
Oh and looking again those peat pellets can cause stem rot in a quick way if not watched. I noticed she is leaning over and that's a sign that your base stem is weak. Prop her up with something and get a lil wind on her maybe if not yet.
Do you have microbes in soil? shouldn't need to ph if you have that and limestone in soil. I haven't brewed up many teas except for some seabird guano but I never check ph with that.