Little seedling having a hard timr

She still looks viable to me - but JUST... I would be VERY careful not to water her too much - water around her, not right up next to her. I'd also drop you pH way down - get it between 6.0 and 6.5 (for all of them!) and for this little one, I might suggest soaking a towel and ringing her with it - maybe about 2" away from her all the way around and make it so that it stands taller than she is ... this will increase the humidity that surrounds her and that is what she needs most right now... again I stress that you can't water her too much... you'll end up drowning her... if you've got the towel around her (or some cloth that will hold water), you can then just water the towel when it gets dry and water it enough so that the soil under the towel is moistened as well - this will put enough water within the reach of her roots and give her a good leg up... Be prepared, though - you may lose this little one. Go gently - and good luck!