What happening with my plants need help asap

Ok this this my 3week seeded plant I give them 18 hr of light with 2 helix cfl about 3400 lumens/feet*feet,Every thing just fine but in the third weed some of them have some little black spot on their leaf and some of the base leaf thrn yellow is this normal what should I do aboout them?
Plase help

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the bottom petals are already dying off.....what nutes you giving them...???

Normally its from humidity....do you have a fan or proper ventilation...do you know what temp. or humidity you are at...???
Normally you would trim off the dying leaves but your plants are so small i dont know...Just the petals...

I'm a rook...but arent the cotyledons supposed to fall off shortly after sprouting has taken place? maybe not.

I don't have any fan for them (now) and I just use a normal soil in frammer market do I need to fut any thing more for them?

Yep, you definately need a fan....dont blow the fan directly on them, bounce it off the wall and put a it a ways back...well depending on the fan you get...and that soil doesnt look to good either....hmmmmm, i always use miracle grow potting mix...never had any probs. It feeds plants up to three months, depending on the grow you might need nutes at flowering...i get it at wal-mart...but you have to have a fan...

I hate to say that I'm grow this shit in thailand so I don't have walmart in here but hell yeah I can get a fan less than 3 buck! what is your recoommend for this grow and any way I god one small plant that all leaf die from the heat do you think I will make it?

wtf...i dont think my post went...anyways, you have to have a fan, of some sort...the humidity looks to high, might be mold killing them...they have to have air to oscilate, and ventilate..etc...and that soil looks crummy, i use miracle grow potting mix, and never had any probs...get it at wal-mart or home depot...and as far as the petal leaves, dont normally die until plant is a foot high...ish I have been growing since i was 18...am 23 now...and i have never used a nute in my life...;P

All right man and what abot the small one with out leaf what you think?

Its a toss up bro....it could be mold from humidity, the fan will really help....if it works you will see results in the next growth, it wont cure the bad leaves but the new growth you will be able to tell...if all the leaves fell of, prob not....but u never know...never say die and dont toss it till you know its gone....as far as the setup looks good, besides the fan...maybe some foil up around your brow area to reflect light to all areas of plant...???
And if you wan to, you can cut the dead petals of the plant, it will stop the plant from putting all its energy to save those little petals....I have never tried it on a plant so small so be careful...maybe only try it on one and if it looks ok, go for the rest...
anyone got any advice on cutting so early in veg. state...???

Miracle Grow soil for seedlings......NO...... I would ad some perlite to your already existing soil. Ph the water and the soil to around 6.5 - 6.8. You wont need nutrients till about the 4th or 5th node. The fan just have blowing inbetween the lights and tops of plants. Try to keep day time temp around 77 degrees and night temps above 65. A little over or under no problem. Also use distilled or reverse osmosis water if possible.

Hope this helps, anymore questions feel free to pm

i would recommend re potting them right now, normally you would wait just a bit longer but if you repot now to a bigger pot it should bring the ph up a good deal. theyr already suffering from root lock, its a common problem that new growers have, they feel the more nutes the better. i thought the same thing and had the same problem. but the thing about growing it is'nt the nutes inparticular but the timeing of the aplication and the proper amounts. along with the correct consistencys of everything. plan it out and follow a chart marking your plants growth.

also, remember patience can be a virtue. i know i stare at my darlings for hours but. patience young grass=hopper

I always use the miracle grow potting mix and never had any probs...its time release, i have been growing for 5 years....with 5 crops use the same system every time, never lost a seedling ever, never lost a plant..Im not bragging but its so simple... My plants are all natural, i have a very simple system that always produces results....I just grow them as they are suppose to be grown in nature...all natural....amd i never check ph, i just give them lots of love and they love my right back....lol

thats true if you dont use nutrients, then thers is no harm but a lower yield, bud density, and thc production occurs as well. its all just in the particular growers wants and needs. i believe it is well worth it to do all the math and use nutrients accordingly.