So I've asked this question on several forums but really havent got any good answers. Figured i'd try out rollitup again. I have tried to provide as much details as i can (i just copied and pasted a questionaire from another site) and i have also attached some pictures. Hope someone can help!

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on? about 2 weeks
Are you growing in a PVC grow tent? no, growing in a closet
What system are you running? Ebb and Flow
What STRAIN are you growing? Dutch Passion White Widow
What was the establishing technique? clones
What is the age of your plants? 6 weeks
How tall are the plants? about 9 inches
What PHASE are the plants in? vegatative
What substrate/medium are you using? Hydroton
What is the Water temperature? around 22 degerees celcius
What color are your roots? White? nice and white
What Nutrient's are you using? Fox Farms Hydroponic solution
How often are you feeding? flooding 4 times a day for 15 minutes
What is the TDS/EC? TDS is around 330 ppm
What is the pH of the "Tank"? between 5.5 and 5.8
Are you sure your calibration is correct on your equiptment? yes, calibrate often
How often do you clean your system: once a week
What size bulb are you using? 4 t5's
What is your RH Factor(Relative Humidity)? around 50%
What is your room temp? about 77 degrees F
What water are you using? RO
Have any pest chemicals been used? If so, What and When? no
Are plant's infected with pest's? no

what's the queston???

of course my stoner ass forgot to attach the pictures. here they are....

whats going on with them? they started off great and then just started to crash

ARGH, why wont the pics attach!

one more time........here's the pics....

Attached Images

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i still have a hell of a time with attaching pics. lol dont think i still haveit figured out.

lookink at the bottom - lower leaves it really does look like a case of nute burnn the way the leaves are curling and turning brown. however going by the information you given and the ppm at 330. that would seem unlikely. i keep the ppm on my plants during veg at 650-700ppm aand i also use foxfarm nutes and soluables. the only other queston i can think of asking is how far away are your lights? i might even go as far as to limit your watering to 3x to give your roots as much oxygen as possible.

You need to check your EC/TDS meter, homey - that's nute burn, kid.

You sure it's not 1300 as opposed to 300?

__________________
Check out my journal for links to Youtube videos of my setup:

http://www.rollitup.org/grow-journals/250027-bubblelicious-new-york-power-diesel.html

You said that the TDS is 300 currently, but the new growth looks fine - what WAS the TDS when those leaves got roasted?

__________________
Check out my journal for links to Youtube videos of my setup:

http://www.rollitup.org/showthread.php?t=250027

I swear, im telling you the TDS is reading right around 330 (and has always been at that). no bullshit, its something else other than nute burn...it has to be, i am barely adding anything and i am religious with checking my PH and PPM's. Im assuming its like a phospherous deficiency or something, but I keep getting answers that are all over the place. Some say they arent fed enough, some say that its nute burn. This is is why I need some HELP. No idea which way to go. I need some experienced grower advice! Please help me save my girls!