400 watt HPS is going to be a lot better then a 100 watt metal. Most people use HPS through out the entire grow. I personally have never used MH, ever, but it is supposed to be better I guess.

Sucks on the nute burn, but 1050 is pretty high ppm for their size. Depending on what your water starts as, I would give them around 400ppm of nutes because those little ones wont be able to handle much and they are in the same rez. The larger ones could probably take 600. I give my full growns about 1200ppm of nutes, (leaving me at about 1500ppm), but they are 2.5 feet tall.
Racerx Reviewed by Racerx on . Hydro White Widow Grow Heres some pics from my hydro white widow grow...Alot of the details can be found in basic growing under "growing the widow". They are all about 3 1/2 weeks from seed, some sprouted really late hence the size difference. Is the growth on track and do they look good? Oh and the burn on the leaves is from spilled nute/water mix I believe. Rating: 5