Need help in identifying sickness (GOOD PICS)

[Villain]

Hello guys I have been battling this for three days nows and I thought it was PH again so I went back to 5.5. Anyway so here is the situation...I am doing a LAAG (Low pressure Aero-Assisted Garden) and using Fox Farm nutes. I am using a 400GPH pump and (5) 360* EZ-cloner spray nozzles. PH was at 5.2 for a while but then I noticed that leaves were discoloring and went back to 5.5 in hopes that all would be better. ATM I can't see any positive change but it may take a few more days right (been about 40hrs so far).

I seem to think that it has spread from old to mid age growth, and young new growth is beautiful. I have a feeling that it may be a Mg def. from lockout caused by the 5.2 PH. I really don't know though it's been about 2 years sense my last grow . Anyway here are the pictures hope you can help me out with this thanks.

 

[Growdoc]

Do you have algee growth in your LAAG?

This is not a MG def, did you spill some nutes on the leafs?

How many PPM or EC are you feeding?

PH5.4 should be ideal for this system but depending on the strain it can go as high as PH5.8

GrowDoc

 

[Villain]

Will the PPM on my Hanna Primo PPM pen reads in at 440 I'm really not sure if thats to high for this strain (Widowmaker). I did foliar feed yesterday but that was after all this happened. Do you suspect it to be nute burn, I changed out the res around Thurs. or Fri. and I used full strength Fox Farm nutes. I just checked in there a minute ago and it seems to be getting worse. The new growth is completely unaffected for right now and hopefully we can nip this in the butt before it gets them too. Thanks a lot Doc PS I have

PS I haven't noticed any algae so far but I will keep a look out for sure. As a matter of fact the water is pretty clean from my point of view.

 

[Growdoc]

You will not be able to save the old growth that is already affected, but no need to cut it away until it dies completly.

440ppm should be ok, can you get a pic of the roots please. or tell me hwat they look like. pic is best!

GrowDoc

 

[Villain]

Here are some root pics and some sickness progression. I already removed two leaves but I will not remove anymore thanks again. I hope that these help this is becoming tiresome but I guess it's all a part of the learning process right.







The roots look really good to me minus the light brown from what I assume is caused by the nutes (Fox Farm). I have this one in a 6" netpot so the roots may look skimpy but they are really more than a foot long. The oxygen roots are getting bushier too at least they seem to be as far as I can tell.

 

[Blackvelvet]

Ph 5.2 is really low. Try a ph closer to 6.

 

[Verite]

Does it only happen on the lowest fan leaves? Could be just some organic splash that browned the leaf spots. Especially since the rest of the plant looks healthy. Even the rest of the leaf looks healthy.

 

[MynameStitch]

I would try upping the ph first; if that does not sole the issue then this strain is picky with it comes to nutrients. Get your plants up to around 6.0 ph and wait to see if newer growths when they get semi big if you don't see it progressing then you fixed it. I would not add any more nutrints untill you fix the issue because you have enough now in there but since ph is low other nutrients are lacking absorption.

 

[quantbender]

most prob ph is imbalanced

 

[Villain]

Ok I've had my PH up around 5.5 but I will up it to around 5.8 hows that? I will post back if it gets worse not that I can do anything about it. I know that it will take a few days to straighten out so I will try and be patient. Should I foliar feed with plain water for right now?

Boy oh boy I hope this ends soon.

 

[Growdoc]

OK with brown skinny root like you have you have ROOT ROT. The roots will not take up nutes the correct way as long as you have this prob. To fix ROOT ROT use HygroZyme along with root stimulator BE EASY ON THE AMOUNT

You can always foliar feed plain water with a 5.8PH in vegging and newly flowering plants.

Are you useing a nute made for soil in your hydro set up?

Dont forget... the roots are the first half of the plant!

GrowDoc

 

[MynameStitch]

I thought that too growdoc; but it looks more like to me discooration from the nutrients.

Fox farm nutrients do leave a stain on the roots. Usually when they are the brown ther would be some kind of slime on the roots.

 

[Villain]

There is no slime and the roots look very white at there tips. The part of the roots that are hanging in the water are very white. The parts above the water are stained brown from what I thought was the nutes. But if you say it rot who am I to argue right. I am using hydroguards by the way... so will I still need hygrozyme?

 

[MynameStitch]

Root rot would be brown when they are in the water not out of the water; it would spread from the water up not from up to down.

I highly doubt that is root rot; but you are the grower you chose what advice to take

 

[Villain]

Honestly I never expected root rot, it's just that if I knew what it was I wouldn't be here. That being said who am I to argue whether or not it is root rot. I do have one question however... root rot does start in the water and works up the root? My PH is up around 5.8+ but still less than 6 so I hope that helps it out. As of right now it is still progressing but I know it will take some time. Hopefully in a few days it will be all square and I can post back with positive results.

 

[Villain]

Ok I have an update about the PH... my meter was off a little bit. I took a reading and then calibrated my meter and took another reading than read 2.0 lower :O. So when I set it for 5.2 it was really about 5.0 or so. Also when I corrected it to 5.5 it was still lower, and 5.8 was still to low. So after cal. I set it 5.75-5.8 and hopefully the slow rise will allow it to actually survive now that it is at ~5.8. I will update again but as of right now there really does't seem to be to much change, it hard to say for certain. Later guys.

 

[Villain]

As of right now they have not improved at all. I changed out the res today and I am maintaining a 5.8-6 PH, and ppm around 750. Her leaves are continuing to get worse as far as I can tell. I was thinking could this be nute burn I really am stumped on this one. I have the plant in a DWC setup as the aeroponic setup need improvements and mods. If there is an IC member that can help please help.

 

[Growdoc]

If you can please show a new pic.

Is the new growth being affected?

Are you still foliar feeding?

Do you change your res once a week?

A plants life starts with a root and so do most of its probs, with more then adequate root growth plants substain better enviroments.

GrowDoc