Fungus gnats can cause young plants to have leaves that turn yellow and drop at such a rate that the plant will
never produce more than an ounce or so. When you get the gnats out the plants should slowly return to normal.
It took about 3 weeks for my plants to start bouncing back and begin making more new growth.
My first impression after seeing the pic-----not enough light----use at least a T5.
Also, could be as jayjay said------over watering if the stems aren't drooping too.
I see you're new here----welcome to RIU. May I suggest posting your soil grow questions on the forums here where soil growers hang out (this is the hydro forum)
Thanks for the help and I'll remember to post in the soil sect and not hydro lol
Wasn't mold. Was diatomaceous earth for the gnats.... Fungus gnats are gone now and She has bounced back, minus the few set of leaves that were clawing... Think she had also nitrogen toxicity. Flushed her out. Changed lighting - using 400 hps and 2 100w cfls
Also transplanted her into a 10 gal.
Hopefully she can bounce back
Thanks again