First time grow

This is my first grow, I am 19 days in--I have previous pics, but I will start with where I am now.

4x4 tent, 600w mh & hps

Think I've been over watering them a bit and giving them a little too much nutrients in their drink, so I'm going to just give them some RO water. Only a few of them are showing signs currently, but I kind of knew I was giving them a little too much so I'm guessing that is what it is.

If anyone has more knowledge on that kind of stuff, I'd love to hear it as I don't really know this plant too well (grown veggies on a farm before). I've got 4 WW, 5 Ice, 4 Crystal. I originally germed 5 of each (used a method I read about, rather unusual but it worked surprisingly well). 13/15 came up (all within 24 hours of dropping the seed directly into the soil [i made a chlorine/water mix (very low ratio), soaked seeds for 30 mins in the solution, then soaked in grocery-store water for 24 hours before going directly into the soil]).

They were just transplanted today (right before I took these pics) from 16oz styrofoam cups to 3gal containers, so they look a little stressed

Looks like they are slowly recovering today--think I caught the issue before anything got too bad (hopefully).

I transplanted them yesterday from a Fox Farm seed starter soil that I used in the Styrofoam cups to a Just Right Xtra soil mixed with some extra perilite for drainage.

I used the Botanicare Pure Blend Grow Pro for the first two weeks, and have been doing a mix of that and the Botanicare Pure Blend Bloom Pro (for Soil). Also just made a couple ghetto co2 bottles (Just yeast, warm water, sugar in a water bottle with a punch-hole through the cap) and put them in the tent, we'll see how it goes. Temps seem to be manageable, gets down to 65-75 ambient throughout the day and night, 81-88 during the day in the tent.

Using a 600W Quantum Ballast w/ XtraSun Reflector & PlantMax 600W MH/HPS bulbs (they were free). Just using a 6" 250CFM inline duct fan that I grabbed from Home Depot and some ducting for the cooling of the light--does it drop temps to remove the glass from the reflector? I heard it does, but not positive.

Extra pics, not too much of a change, but some better ones of the whole operation.

They're starting to bush out, that's for sure. Hopefully that girl in the back right makes it through the nute burn okay--she took it the worse out of the 4 or so that got affected.