Quote Originally Posted by simplegreentoo
Please note some changes to original troubleshooting form:

8. 8 inch net pot is NOT in DWC
9. Rapid Rooter grow cubes
10. Well water is now RO water at 0 TDS and 8.5 ph
13. GH Flora Nova (grow) 7-4-10, 1 tsp per gallon. 4X1/4" tubes per pot, not saturating rocks thoroughly, with feeding 10 minutes every three hours
18. Not foliar feeding as of two days ago

Initially well water was 600 TDS base and 1150 with nutes. Switched to RO water and are still purging with 300 PPM solution. (Zero PPM RO water plus residual nutrient solution from container).

Roots are white and healthy, just emerging from net pots into fogged container, two inches above solution. Solution is presently mid 70s, but attempting to reduce to mid 60s.

Rapid Rooter cubes were not rinsed. Rocks were rinsed, but not tested.

Sealed grow room now vented at 85 degrees, previously 90. Passive fresh air vents and circulation fans always on.

This is our first grow and plants are seven weeks from seed. They are only 6 inches tall and bushy. Both plants have tiny white hairs at top and on leaves. Isn't this small given CO2 supp? Light is being reduced by 1/2 hour per day with 12/12 in 9 days.

The Advanced LED light is a 180 watt, 11 wave length, 3 watt LED panel.

Thanks much for the feedback and more would be appreciated.

Later

exactly what hydroponic method aer you using. If the plants are in net pots but arent dwc, how exactly are they getting water and nutrients.

at a glance the sagging leaves and overall yellowing of the leaves looks like overwatering. How often are they getting fed? How are they getting fed? You havent really answered these questons yet so we cant even really give you a suggestion. She looks like she might be drowning.



while some of your leaves are yellowing, it doesnt raelly look like N defiency to me. Too high, or too low of a PH looks more likely. Make sure you properly PH all nutrient solutions after adding fertilizer. Check your PH in your res every day to make sure its not bouncing between acidic or alkaline.