Hey, i figured this would be the best place to get my slue of questions answered.

I'm a noobie grower and i believe it's been goin pretty good so far.
But recently i've had lots of problems.

I had to transplant my plant into a bigger pot, but before i did that, to my surprise, i found huge yellow spots on my two main leaves. I did some research, and i'm convinced that it was due to over-watering. I figure i'll let the pictures do the talking. Now, i have 2x 50 watt HPS bulbs, but no lamp to put them in and i'm really confused about how to set that up and run it. Since i noticed the yellow spots and transplanted my babe, i haven't really been giving it more than 10 hrs of sunlight/day, it hasn't really grown or shown improvement the past 3 days and i'm very worried. It seems like too many problems at once..

I basically just want to know if they'll survive, should i cut the yellow leaves off? (i see the new leaves coming in as if nothing is wrong.)

Here are some basic facts about my plant:
  • about a 4 Gal pot
    Miracle Grow Potting Soil (It's grown fast so far, i'm not gonna do the peat moss/sand/whatever else mix)
    I've been growing for about 2 weeks
    I've been using a 120 watt plant light bulb by GE, and it worked for a while, before i started looking into a Metal Halide or HPS lights.
    I've used a tad of fertilizer, but recently have stopped due to the new potting soil i placed into the new 4 gal pot.
    That fertilizer was 20-20-20


I'm just growing pot to have a constant stash, I don't want to lose my babe.
Help plz.