Plants look sick, Need Help~ Canoe Leaves~Purple Stems and Stalks

[Bogie]

My girls have been vegging for 11 days now, and they seem to have problems. They are on the Lucas formula (0-5-10). Though this looks like a PH problem to me, the PH has been running between 5.5 and 6.0. I just got done with a complete flush. I cleaned everything. The plants are clones taken from my mother plant. I have grown this strain in my two previous grows with no problems. The strain is unknown, it is bag seed from some real good hydro that seeded.
Their leaves are curling up. They look like taco shells. The stems and stalks have turned dark purple. Some discoloration on some of the leaves.
My air temps inside the box are between 80 and 85 degrees. I am using a 400W MH conversion bulb with my HPS ballast. It is in a sealed, air cooled reflector. The light is about 15" above the tops.
Here are a few pics. Any help here will be greatly appreciated

 

[DrGreenThumb@OZ]

overwatering ?? root rot ??

do you shake up the nutrient bottle before mixing with water then give to plants ?

Dont water everyday and only give nutrients once a week ...

even reduce the ratio of nutrients to water and see how u go ..

 

[MoPho]

I am having the same problem. If any1 can shed some light on this. It would be greatly appreciated.

Clones-10 days (after rooting)
GH nutes (321)
Ebb n Flow
PPM=550-600
600watts MH appx 2 feet above plants

PH 6.0

 

[MynameStitch]

How close is your lighting? the purpling affect is a strain trait that changes color, what is your night time temps?

normally it takes a cooler temp to cause them to show color changes if the strain has it in it's genes, but there is also a lot of strains that just change color.

If the leaves are curling you either have your PPM's too high and or the light is too close , even with a hood that is vented the amount of lumens can cause the problem, not saying that is what is going on here though.

I think you may be over doing it on the nutes..... lucas formula does not always work for every strain......

The last picture the one of the far right, the lower leaves are showing P issue, either locked out, or it's not getting enough,

What color is your roots? Take a picture of your roots
Also can you fill the questions out at the bottom, need more info as to what is the cause of your problem.

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on?
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)
What STRAIN are you growing?
What was the establishing technique? (Were the seed or clone?)
What is the age of your plants?
How long have they been in there mixture they are in now?(coco,soiless etc..)
How tall are the plants?
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Water temperature?
What color are your roots? White? Brown? Are your roots slimy?
What Nutrient's are you using?(If growing soiless)
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding? (If using soiless)
How often are you giving nutrients? (If using soiless)
If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"?
Are you sure your calibration is correct on your equiptment?
When was your last watering?
What is your water temps?
When was your last feeding change? (ie. grow-bloom-micro-additional)
How often do you clean your system: example: Flush out water replace with clean water and nutrients?
What size bulb are you using?
What is the distance to the canopy?
What is your RH Factor(Relative Humidity)?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
Are you using water from a water softener?
Has plant been recently pruned, cloned off of or pinched
Have any pest chemicals been used? If so, What and When?
Are plant's infected with pest's

 

[jyme]

are you not adding nitrogen to your solution and it looks like a (mo) def. (mo) gets locked out when your ph drops below 5.5 just slight fluxuation with ph can cause lots of nasty problems