rob52587

my growing substrate is hydroton clay grow rocks, in 3" net pots. i also have placed three 6" fans on the inside. my problem is that my plants are 3 weeks old and two leaves at the bottom are completely white and the set of leaves above them are yellowing out leaving dark green veins and burning at the tips. the inside of my phototron stays about 80 degrees farenheit so i don't think its heat stress. i have plenty of pics but do not know how to post them. Any feedback would be Highly appreciated.

i am a beginning grower i have a 5' phototron that i have modified into a deep water culture unit(bubbleponics). there is a total of 6-54 watt flourescent bulbs, 6-24 watt flourescent bulbs, and 2-100 watt equivalent full spectrum daytime cfl's. I basically took shower flooring and cut it in to the shape of the inside of the phototron and cut 5-3" diameter holes in it. I have a 6" airstone, a 8" bubble wand and a 12" bubble strip all connected to a 100 gallon 5 watt air pump with 2 air nozzles and a 10 gallon 3 watt air pump with one nozzle that is attached to the 12" airstone. all airstones are placed under 3 gallons of water and dyna grow vegatative grow nutrients currently at half strength. (continued on down due too many characters):neutral:
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