Very Informative cowboy and dream thanks! i will be getting that PH kit tomorrow along with changing the water and i will try to save her just cause it will help me learn a bunch, plus i have another slot in the top for another lady....should i start one now or wait till after i figure this one out?

If I was you I would learn from this one. But if you dont have feminized seed then it could be a male and that would really suck cause its your only plant. If you have more more chances for females. Wont hurt to start a few more. You could always start them in dirt and then switch them to hydro once you get the hang of things.

You all have been a HUGE help! I CANT THANK YOU GUYS ENOUGH! res water changed, moved lights to about 4 inches away....only those two leafs showed in picture are still yellowing and dying more, should i clip them off? and i noticed yesterday the second node the very tip of the leaf was starting to turn yellow, and today its back to a greenish....so i guess the root spray helped this baby out, now she got fresh water, well see what happends will come back later with more pics, also should the lid to my res be lined with something to help keep more light out or even reflect heat?

Yeah your res should be light proof

You can actually come closer than 4" with the cfls. If you are vegetating that one seedling alone, I feel it is a waste of energy to use close to 200 watts. Take into consideration, I tend to veg seedlings with combination of cfls and natural indirect sunlight.
If the yellowed leave has reverted back to green healthy tissue, obviously leave it alone.
The completely yellowed leaves that are dying, go for it...clip them. This will encourage branching. However, I suggest not doing again until they are at least 3 weeks old....and keep on a steady regimen of 18/6 lights while vegetating.
Again, I do not grow hydroponically, but I would suggest a white background for the base, not mylar or aluminum foil. I've personally tested both and white is most efficient with reflecting light and delivering less heat.

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Originally Posted by CrackerJaxWelcome to the nanny state where strangers profess to know ur family better than you.....

sorry i was out of town yesterday, thank you for the reply, so your saying just like a piece of white like cardboard would be ok....almost like construction paper but a little thicker? also the yellowing leaf like is half dead but seems the end of the leaf closed to stem hasnt turned yellow like the rest of the leaf, should i just clip it anyways beings about 3/4 of the leaf is yellow n dead? and are you saying i have too much light for the one plant? i was under the assumption u can never really have too much light?