HELP! Canabis leaves turning yellow/white/bleaching + drooping?

[Brown]

Hello,

I've been growing this auto plant for about 12 days which has an airstone providing constant oxygen 24 hrs. On the 10th day I decided to place it in my space bucket, unfortunately, the cannabis leaves started turning yellow and white at the top, also it has started drooping. I've done some research to diagnose the problem and I believe it is more to do with light burning than nitrogen deficiency but would like a second take from more experienced growers on this forum.

• The light source is a UFO LED Grow Light with an output power of 300W and is ~74 cm away from the plant
• The temperature is maintained between 71.6 - 77 °F with a PC fan blowing air directly to the plant.
• 1/2 quantity of Floro hydroponic nutrients provided with pH at 6.30

Thanks
- Brown

 

[RagWeedDWC]

Are you top watering the plant? The stones look bone dry

 

[Brown]

Hey RagWeedDWC,

I'm not top watering the plant, I didn't feel as if there was a need since the plant is in DWC.

 

[RagWeedDWC]

Are the roots already down thru your net cup into your water. Your netcup should be about an inch about the water, you should water from the top until the roots are completely immersed in your nutrients. Or put a small pump and pump water up to it from your tote via 1/4 hose and fittings, or use a spiter device to dribble water.

 

[Brown]

The roots are well developed, there's several which have grown outside the net cup. I've removed it from the space bucket and placed it in direct sunlight - the plant seems to be recovering without changing the reservoir so I doubt it was any nutrient problem either. So I think the light source was too close maybe or it may have been wind burn since my fan is pointed directly to my 2 week old plant.