new growth yellowing!!! help!!!

[tricknology]

growing under a 400w hps in rockwool watered daily with pH 5.7 nutrient solution. Nutrients used are Pure Blend, Cal-Mag, and Liquid Karma, and K20 is used as a pH downer. As far as concentration is concerned, I am using the dosage required for mid-sized veg. I used bottled water for awhile to water the plants, Im pretty sure it wasnt reverse osmosis water but it said minerals were added.. mayve that has something to do with it? The plant does not look burned to me because the bottom growth is healthy. and not nitrogen deficient for the same reason... the seedling also exhibits the same charachteristics as do the clones (but they look like they show signs of burning).
One was flushed with pH 5.5 r.o. water and one was watered with pH 5.7 nutrient solution. the one watered with nutrient solution stayed the same while the other got lighter... all plants are in veg. temp: 78-80, r.h.: 30 (needa new fan). any help would be greatly appreciated. (I read somewhere that it might be zinc deficiency...)
Pics are in my gallery since i can't attatch them...

 

[DontBanMe]

The middle picture looks like Iron def.
Goto this website and you can make the best comparison because you can actually see your plants very well. http://www.ganjaguerrilla.net/

 

[tricknology]

HYDROPONICS/Aero Ponics

What STRAIN are you growing? Bubba Kush, L.A. O.G. Kush seedling
What was the establishing technique? (Were the seed or clone?) 2 clones 1 seed
What is the age of your plants? a couple months
How tall are the plants? about 1 foot, but trained and topped so all the colas are about even
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? ved/seedling
What Technique are you using? lst, topping
What substrate/medium are you using?(Hydroton, RockWool etc.) rockwool
What is the Water temperature? r.t.
What Nutrient's are you using? How much of each if using multiple? 5ml per gallon liquid karma/ 10ml per gallon cal-mag/ 10ml per gallon Pure Blend.
What is the TDS/EC/PPM you are using?no idea, cal-mag ppm is
What is the pH of the "Tank"? 5.7
Are you sure your calibration is correct on your equiptment? pretty sure
When was your last watering? today
When was your last feeding change? (ie. grow-bloom-micro-additional) never
How often do you clean your system: example: Flush out water replace with clean water and nutrients? well the rockwool gets re-watered with when dry, flush with 5.5 water every 4 days to a week..
What size bulb are you using? 400w hps
What is the distance to the canopy? 1 ft
What is your RH Factor? 30, needs new fan.. 70 at night
What is the canopy temperature? 78-84
What is the Day/Night Temp? (Include flucutaion range) 78-84 day/65-70 night
What is the current Air Flow? (cfm etc.)idk
Is the fan blowing directly at plants? directly at the bulb
Is your water HARD or SOFT? hard, but using r.o. water
Has plant been recently pruned, cloned off of or pinched yes but yellowing was present in small ammount then, not really significant at the time
Have any pest chemicals been used? If so, What and When? no
Are plant's infected with pest's? only a little algae on the rockwool... nothing significant

 

[tricknology]

how is this fixed? will the yellowing go back to green? also when should i flower these, theyre about a foot but trained so that all the branches are even... what do you think for bubba kush and la. og. kush?

 

[MynameStitch]

Do you have any pictures to show the problems? WIthout it we can only go by the information you gave us and it's more like a guessing game and you most likely won't get the answer you need unless we can see the plants.

 

[DontBanMe]

Pics are in my gallery since i can't attatch them...

fksdfsdlkfsdfsdlkfsdlsdflk

 

[MynameStitch]

It's either iron or sulfur problem you are having; I posted in the wrong thread I was supossed to post in another thread asking for pics; so that was my bad, wrong thread lol

I have never seen a sulfur problem in hydro; but have seen iron issues......
If you can get some earthjuice microblast and use that 2 ml per 4 liters of water.

But your problem sounds like it's coming from a lockout; 10ml of cal mag is nuts; 2 ml per 4 liters of water is plenty; cut it down; you will have to change out your water and add different levels of nutrients.....

Are your plants in just rockwool? are they in a hydro system? what setup are you running?

You really need to get a TDS pen, you could be burning them and locking out nutrients right now and not know it; growing hydro without a TDS pen is like trying to drive a car being blind; it's not good nor will you get very good results unless you know how to read your plants; even then when it is time to top off you will start to have issues, because you won't know how much nutrients are being removed from the water from the plants.