pics inside yellow leaf and browning please help

i got 5 plants and 1 of them well theres a pic any help please and are my other plants looking ok they being veg for a week now under 600 watt light but the timer broke so where on 24/0 but now got another 1 and it on 18/6 reps will be given thanks

how often do you water?? also i would only be giving them ph balanced water right now...

very 2 days but i have been feed them nutes very other water so twice

yea they are still to small for nutes.. wait till that stem gets a little bigger... then progressively raise the ppm levels in your water when you start flower... for veg you dont want to go over 800 ppms and starting at about 300-400 ppms is the safest way to go..

you know what i wouldnt feed them anything besides ph water till you transplant them to bigger mediums..

thanks dude

no prob