Sick droopy seedlings please help a frst time grower.

Strain: 3x Jock Horror Auto Flower
Few Important details
Growing in a 2x4x7 grow tent with a 600w hps. As well as 1.5ft UV Tube light. 20/4 is the schedule although the UV light is only on for about 5 hours a day.
Im growing via 20 gal DWC drip system with 2 6 inch air stones per 20 gal.
I started out with water pumps on 24/7 but since the droop started Ive turned them off in case its over watering. 2/3 seedlings have a root in bubbles/reservoir.
I gave them all 1/4 strength super thrive so this could also be a nitrogen thing.
Please share any and all thoughts, comments, opinion's etc. Everything will be appreciated by this first time grower Thanks in advance to all of the Rollitup Community

Ooops forgot to mention that I planted these from seed on 4/17/15 all sprouted 2 days later. we are currently on day 10. Drooping leaves slow growth, and a little yellowing are symptoms

Here is a look at the plant without roots in solution. Very far behind the other 2 as far as roots go

All your root mass right now is in soil cube, and it's saturated with water, there is not enough oxygen in the cube. Dont water hem from the top. You should be using rockwool cubes when growing in DWC, there should be nothing organic going in your reservoir. Also I know that UV spectrum produces ozone in the air, this can also be ozone damage if you keep UV light too close. I am not sure why you need UV as HPS on its own will do fine.

JohnySmith1 said:

All your root mass right now is in soil cube, and it's saturated with water, there is not enough oxygen in the cube. Dont water hem from the top. You should be using rockwool cubes when growing in DWC, there should be nothing organic going in your reservoir. Also I know that UV spectrum produces ozone in the air, this can also be ozone damage if you keep UV light too close. I am not sure why you need UV as HPS on its own will do fine.

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Really ive read otherwise but I will look into it on my next grow for sure. The UV light is also to prevent mold and gnats. As well as add some blue spectrum since the HPS may make the plants stretch overly but I keep it around 6 inches away and I rotate it from plant to plant. My HPS has been about 2 feet away maybe its just too much light?