Yellow rather than green

hi guys, am using an ebb and flow hydro setup. my plant is growing but the leaves are turning to more yellowish rather than green. also the leaves are curling themselves. the timer is set to 6 times for 24. could you please help me what is causing this yellowish and curly leaves.
thanks.

That's normally from a lack of nitrogen. Are your nutes and PH correct? If they are, I'd look into overwatering, starving the plant of oxygen.

dude it looks like you nuked it

You dont need nutes now, looks like low light. Is it just in a window sill right now?

It's VERY hard to underfeed a seedling, there's plenty of nutrients in the seed to get it through the first few nodes. If you were feeding it anything yet, then it was too much. Whatever you do, don't give it more food.
I would still be letting it grow another node or 2 before starting with very mild feeding.
6 floods per day is not needed either, cut that in half.

hi guys , thanks for your help.
yes it is near a window. is that the mistake??
i will cut the watering ration to half and will give her a little more light. hope she'll get better.

Ahh, that explains it. I assumed it had a little more light than that, so I didn't bother mentioning it. Go figure.LOL

I would prop it up for extra support as it looks quite limp. I'm a dirt boy so I use a tooth pick and garden wire.
back off nutes if you are using any, maybe add a fan to try stiffen the stem.
hope it pulls through for you.