Yellowing Leaves.... What exactly is the Problem?

Hellow Guys. I have 3 Blueberry, 2 White widow, and one afghan plant growing in my 6 Bubbleflow Bucket Setup, Basically a constant flow DWC System. This is the last week i am Vegging them Before switching to Flowering. 3-4 days ago I flushed the System out and increased my Nutes. I am using Technaflora Recipe for success. The last Batch of water was about 900 PPM, The Week Previous to that 700PPM. The last change I did i went up to 1200PPM. My pH is constant around 5.8. My blueberry Plants have been growing great, they still are but i have noticed some yellowing in the middle to upper leaves. I have included a pic or two. What is this? What is going on.

Another thing i want to state is i have also switched from 24/7 lighting to 20/4 Lighting during the last nute mix.

Please Take a look and tell me what you think.[attachment=o285331][attachment=o285332][attachment=o285333][attachment=o285334][attachment=o285335]

Bump

Please Help. If I am to take Corrective action, the sooner the Advice the sooner i can fix!

From what i have been researching, it looks like light stress, or mag deficiency. Any Opinions???

My friend, you won't get much worthwhile advice with the information provided.
I'd advise you to fill out the troubleshooting form.
At the least, the act of filling it out may help you diagnose this yourself.
Also shows that you care enough to put in that effort.

Might even be able to help you with this myself, but at this point it would jus' be a wild assed guess.
And that worse than useless, yah?

Aloha,
Weezard

Trouble Shooting Forum?

Prime Da Pump?

You have such a huge Signature and everything else. May seem Flashy to you, But May and will confuse others....

Anyways Could You please Elaborate on what you just said.

If there is a troubleshooting form, Where is it?

What the heck does Prime da Pump Mean!?!? I Literally know what it means, But Elaborate on that.


Please.

Quote:

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Trouble Shooting Forum?

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No. Weez meant Troubleshooting Form - not "forum"

Quote:

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If there is a troubleshooting form, Where is it?

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Its the very first "Sticky" thread at the top of Plant Problems forum page #1.

Here ya go brah.

http://boards.cannabis.com/plant-pro...anted-one.html

There's a whole country song about Prime the pump.
http://www.leoslyrics.com/the-kingston-trio/desert-pete-lyrics/

Boils down to; You've got to give before you're ready to receive.
Sorry, thought is was explained in the message.

"Also shows that you care enough to put in that effort."

You'll find that asking questions and waiting for answers is very slow, and ultimately frustrating.

All the information you need is in the first link in my sig.
If you are willing to dig for it.
Yes, it's daunting but my most treasured knowledge was acquired while hunting for something else. :)

The more information you put in your question, the more likely you will get useful answers.

Didn't mean to confuse.
Tryin' to be a help.

Aloha,
Weezard

OK, Thank you Weezard and Thank you Burnt Toast. Added to both your reps, thanks.

H=Answer if you grow hydro or aero
L=Answer if you grow soilless other than coco (Promix, Hyponex, SunshineMix)
R=Answer if you grow in RockWool
T=Answer if you grow in HydroTon
E= EVERYONE needs to answer lol!

E-indoor or outdoor - indoor
E-soil, soilless, coco, aero, or hydroponic - aero + hydroponic
E-specific medium - Rockwool in Hydroton
HCL-Hydro/aero/soilless system type - 6 5 gal Bubbleflow Buckets with Constant flow (Superponics.com) DWC + Constant flow (4x4 Growlab Tent)
E-Water source -Tap water - 100ppm
E-Source water pH - 5.7-5.8 pH
E-Age of plant -40 days old
E-Type of fertilizer - Technaflora Recipe for Success
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) - 1200ppm
E-Lighting source and distance from plant -600w HPS Air Cooled 30" away
E-Air temperature (both day and night if you are running a dark period)- 75 Degrees F / 70F Dark Period
HD-Reservoir temperature- 60 Degrees F
E-Air % Relative humidity- Aprox 65%
E-Lighting schedule- Was 24/7 - Just switched to 20/4 4 days ago
E-Type of ventilation your room has - Phresh Carbon activated filter - 150cfm 4" inline eco fan + one Circulation fan
TR-Did you pre-soak your media in pH corrected solution? -Yes!!!!

There..... Now from all my posts, my pictures, and everything. does anybody have any Idea Why y leaves are turning yellow?

You said;

"My pH is constant around 5.8."

Odd, Because that sure looks like high PH lockout to me.
Can I assume that you monitor the tank PH constantly/daily?

The trouble began when you increased the ppm.
That sounds like a clue!

That usually causes the PH to drop more than before.:)

Good Hydro nutes are formulated to drop tap water from 7 and above to around 5.8 or so.
If you start with 5.8, then mix in the nutes, you get a drop that you don't need and you end up having to add PH-up.

The air-stones also play a role here.
Dissolved CO2 lowers PH. Dissolved Oxygen raises it.
I looked up the Technaflora and it has plenty of cal/mag.
'course that makes no difference if the PH is off.
Plants won't be able to use it.

Disclaimer:
I'm really not an expert. This is just my best guess.
There are folks on here that I admire and respect for their troubleshooting skills.

Now, they have all the information they need and should be around soon to weigh-in.

Do have one more suggestion though;
Next lights-out, be standing by with white light and/or a flash and retake those pics.
Be sure to show some of the growing tips in your photo.
They are your best indication of what is actually happening.
If the plant is raiding it's fan leaves for mobile elements to support the new growth, there will be signs in the new growth.
Grow-masters can read them.
I'm still learning.

So I'll haunt your thread until an answer is found and be dat much smarter for it, yah?:cool:

By asking a clear question you have done all of us a service when a solution is found.
So, Mahalo nui! =Thank you muchly

And, of course,
Aloha. -- Alo = to give, HA = the breath of life

Weeze

am i reading this right?...you flower with 125w?....thats it?125w?......i would at least equal that to my veg chamber....you seem really dialed in with the ppm's and looks like you got all the toys & such....did a salesman sell you a full set-up?...i'm only saying that,because if you had assembled it yourself(rounded up everything seperatly) you would be more knowledgeable as to whats going on(no offense)...and what you need.....after 2 years of "gorilla"growing,my opinion is this...indoor grows rarely last longer than 6 months (per full session(clone veg flower).....flush that bitch(min 5-1 ratio...ph'd water...no more feed,just molasses every now and then...do you veg longer than 2 months?...molasses not only feeds the microbiotic lifeforms,their waste product enriches the soil...PLUS,its a cal/mag supplement...good luck