You have 2 seeds in that net pot, not 1 like you think. Remove one of them so they dont choke each other out...Move your 400 mh at least 12" from the tops at this seedling stage, then bring it closer (up to 5-6" after they get growing, 5-6"). Your humidity needs to be about 60% during veg, 30% humidity and they will dry up. You can mist them with plain water often and that should help. For new sprouts, you don't need nutes. Normally you add 1/4 strenght nutes after the first full leaf set, not counting the seed leaves (the first 2 single leaves). The seeds have enuff energy to grow and the ppm shouldn't be over 300 MAX after you add the first 1/4 strength nutes. Add additional 1/4 nutes 2-3 days apart until you get to 800 or so. 1200 ppm is for plants is full veg. and I have had full grows at no more than 1000 ppm. These are weeds and less is always more. Your pH should be between 5.5 & 6.5 with 5.8 being optimal. Dont chase it as it will wander depending on it's eating habits and adjust it when it gets out of that range...The pc fan should go. Get a 6" fan to point at the res to keep it cooler and a 12" oscillating to point betweer the light and the tops of the plants....If you'll read the hydro threads, you'll gain a wealth of knowledge. Keep a journal so you'll know what you did wrong and right.... hope this helps...HGH