yes it could be but i use soil with nute mine turn out fine, dont add extra nutes till the 2-3 week, just use water, if that what your doing then you may need to add just 1/4 strenght of fert and use that once a week and see if the plant recovers, and mine was doing the same thing both thing didnt work for me so i went and bought a bottle of Root Stimulator and my plant recovered and grow soo fast. here is wat i did i mixed 1/4 strenght of nutes with 1/2 strength Root Stimulator in Distilled/Filtered water and use that once or twice a week after your plant shows recovery and a boost in growth use this mixuture only for 2-3 weeks, then just use water and fert. so your plant will not be over fert with root stimulator.
You could also use Jiffy-7 pellets. They're sphagnum peat with lime and a low, seed safe fertilizer that has some ammonium content to just get the seedling going. The pellets have a pH of approximately 5.3 and are wrapped in an eco-friendly degradable net. I've successfully germinated seeds in them before, and they work great with the disposable 'greenhouse' they give you. You can find them at most garden centers --- I found mine at Wal-Mart; 72 pellets for five bucks isn't bad.