help got pics

dont count your chickens just yet, the others may go tits up aswell. what soil are you using? is there nutes already in there. if so you have added nutes too soon. how much did you give them anyway. my plants do be 3-4 times bigger b4 i give them any nutes as theres enough nutrition in the soil for a while. make sure your drain age holes are big enough to let the excess water through.
i only ever add nutes when the plants look ready for it and only introduce at just under half minimum reco dose. another thing is watch your overwatering. you need to let that soil get dry b4 each watering. are you phing the water that you add. it needs to be at 6.5, you could give them a flush but they are already ringing and that mught do more damage. let them keep going and then next time they are dry just give a tiny dose of nutes.
lu
good luck with them!

also have you got as small fan to circulate the air over the leaves, just a smll one if anything will do.
lu

yea i think i did over fertilized now that ive been readlin into it cuz they were doing beautiful and my dumb ass thought to give them the seedling strengh of fow farm just water them again today cuz they were dry but will they be ok if i dont add anything for awhile

and i do have a fan its on the right in that pic of the room i have it sort of built in

u need to make mistakes so you can learn not to do it again, doesnt mean your dumb, just eager.
good luc with the rest of the grow.
lu

Those bottom leaves do turn yellow and fall of but you have got them a little hot with nutes or the soil they are in.,flush them with water for a few days and they should clear up