Ghetto Garage Hydro DWC Grow

I setup this ca sb420 medical grow in my garage from parts gathered from the thrift store. The clones were purchased on several medicated occasions and 1 is a transfer from outdoors in late december. Its a quiet setup and in the 3 weeks or so that it has been running, growth and development have been really good. Im using a dwc setup using a beginners nutrient kit from Technaflora...its my first grow so i don't know whats good so far. I prefer to experience first hand than to be asking the salesman or what works for someone else. Keep in mind I have a lot of time on my hands so I dedicate a lot of babysitting to these girls throughout the day.

i've developed upward leaf curl on 2 plants that were rooted using either a jiffy pellet or a coconut pellet? all other plants have been rooted using rockwool cubes. These two plants are also sharing a grow container because of their size and estimated age...which i think they are the youngest of all. I've added an 18" fan to the grow area that is assisting a 4" oscillating fan that is always on except at night during sleep. I also removed a homemade co2 (yeast and sugar) 1 gallon container because i started noticing too many little flies. My question is...anyone have any input on what i should do to reverse this curling...on just these two plants? Oh yeah I make a 5 gallon batch of nutrients that feed all plants for 7 days then i change it out so they are all using the same nutrients so Im kind of ruling out the nutrients.

Lights:
(1) 150hps garage floodlight
(4) 100watt=26watt CFL's 5600k total output 400watts=104watt cfl
On for 18 hours Off for 6 hours

Circulation:
4" oscillating fan
18" oscillating fan

Grow container:
1 gallon buckets for each plant
DWC setup
various aquarium pumps
Technaflora nutrients (beginners kit)

Grow room:
Sitting on 6 cinder blocks and a 2x2 board
2 walls are reflective silver tarp including door
1 wall is garage wall
1 wall is a steel bookcase
No mylar or white paint or any other reflective materials.

Plants:
Hindu skunk and OG (top row)
Headmaster (outdoor transfer) and Diablo Og (bottom row)
NorCal Master and El Jefe (side container)
6 Blue Kush seedlings 4 days old
4 Champagne Kush seeds sprouting