Possible Plant Problems

[b735170]

Thus far I have recieved great and right on advise. I have followed to the T. I see signs of stress or something with the older leaves. This plant is so dense, that the top Fan leafs are blocking light. Also I am geting a buildup of a white substance on my rockwool. If I am missing anything, please let me know.
Day 27 from Seed to What you see
Setup is as follows:
T5 Lighting System
10 Gal Eb and Flow
PH 5.0-6
PPM Unknown
24 x 7 lighting

Also thinking of pre-flowering and was wondering judging by the pics is it time or premature? Also can anyone tell me if it could be female?

[Garden Knowm]

looks great.. either over watering or you took the pictures right whenthe plants woke up/light came on..

if it is over watering you can add airstone..

looks great!!!!

you can 12/12 them now... are you gonna take clones? they look female.. : )
get us a closer pic pf the nodes... I bet you can tell now...

looks great.. nice big 'ol leaves : )

[HumoredSanity]

Is the white stuff like mold? I heard a white mold happpens in Hydroponic systems due to so much humidity, I also heard it's damaging to plants...

I don't know though...

But you might want to clean your rocks and somehow lower the humidity?

[bonbon]

just flush out the RW with plain water on the next res change....bonbon

[woofemlarf]

would you give me some advice about procuring grass in the windy city
thanks
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