Aero root problems and maybe nute burn can't tell???

So I think I have root rot or the start of it. I don't know what to do as I don't seem to be getting coverage to all the roots. I have 20 gallon trash cans and two mister heads per can on opposite sides. I assumed this would be enough but the roots just grow straight to the mister heads and block mist from going anywhere else. It seems that this one plant is really affected and has heavy brown spots on the edges and all over throughout the plant. Stems are looking red or purple too. The other girls in there are alot healthier but are starting to show similar problems with the beginning of yellowing and brown spots too. Please help if you have experience with an issue like this. I dont know if I should put them in smaller cans or what but there is plenty of air around each one. I use the Canna Substra "soft" line. I ph the water first. Is this OK?? I thought I read that ph your water first as not to kill beneficial microbes with ph up or down. I use CalMag to bring the RO water up to about 100ppm after that and then add the nute's until I get to around say 400ppm. Currently in late veg.
Some other issue's I'm trying to work with

-res gets to around 75 sometimes, but, does it matter since it sits under pressure in the accumulator tank? My inline temp gauge usually reads temps of 68-72

-I'm pretty sure my rootzone is probably not cool enough it seems "muggy" or damp when you open the lid to the roots

-no air movement or circulation in root zone, once lid is shut that's it

-Can't find any good info on Canna nutrients with aeroponic. I have tried 350ppm-600ppm and the yellow spots persist. I got info that substra is best in my case since I drain to waste

-Any ideas or info on roots growing straight to mister heads or coverage problems would be greatly appreciated

-Any experienced diagnosis of these pics would be appreciated. Also any info on root rot, if this appears to be it and how to treat it, and if it appears to be too little or too much nutes. I am struggling to find a good ppm range for aeroponics. Thanks!!

What's the placement on your nozzles? What are your mist times? I'm also concerned about the placement of my nozzles & whether or not the coverage is going to be sufficient in the later stages of growth. I'd have to say, increase your on time, ot shorten your off time if roots are drying out. Healthy plants first, root fuzz second, is the motto I'm shooting for. I've adopted using a few drops of bleach in my water as well. I was getting slime on my intake hose in my res, with zero light, zero nutes. Couple drops of bleach, and whammo! Clean.

Potassium def would explain the burned edges, red stems, and tiny spots on leaves

I have two mister heads per can, they are about 2" down from the top and each side is spraying inwards towards the roots. They are on adjustable arms so I can pivot them around. They are normally used in reptile misting systems. As far as times go I am running .7sec on and 2 min off. Think I should go up?
If I need to increase the Potassium then I guess I need to increase the dose of Veg A & B. I wish I knew exactly how much to put but nobody really has any feeding schedules posted for Canna used in Aeroponics. If you go to their website and run the lightest feeding schedule they generate, I still have to go lighter to get it down around 400ppm.

So I cut all the roots off of the one that was all brown and matted together. It seems to be recovering ok. It doesnt seem to be affected at all, even though I cut all the roots off. This tells me it was not getting enough water from the roots or the roots were all dead anyways. Coverage is an issue with aero.

I think you need cal and mag.

pic 1 looks like cal def.

maybe potass def.



pick 8 looks a lot like mag def., which is why I lean to cal def in 1....

brown spots and yellow edges leaves is likely mag.

I see you use cal mag; but I dunno what your ratios are.

So it's still a gimme; maybe potass too... Lookup hydrobuddy free program. You can put in your ferts in the database; pick em out and set the weight used or set the ppm. It will help guide good ratios within what is possible with the nutes you have.

Enter the weight of the container that you're using (grams/milliliters) * milliliters used to get weight of salts added; to find the PPM and ratios you're using.

It's easy to learn and really really really really useful. Really.

Cool thanks for the info I will check that out. I am confused about this Canna stuff. I bought the "soft" water line because they said this is for RO water and the CalMag is already added. But it doesnt look like it is, so I add some in the beginning to bring the ppm up to around 100. Maybe I should go more, or way more but then I can't add as much Veg. A&B. I thought this "soft' water line was supposed to cover those bases but it appears it doesn't.

how could it; they cant know what youre growning and every strain will use nutes differently. They only way to make a good formula is lots of pratice and lots of science and tinkering with different formulations measuring the nutes left in the run off on a week to week basis. Because even week to week the plant will use different nutes. You would have to log everything and consistency is important that you'd have to feed a new ratio based on what you gathered from the previous batch that week in veg or flower. Where as the next week the plant could need more of X nute.

It's truly daunting of a task; but that's how you will at least have a basis to start with when you try some other technique to see if doing X will improve yield or not.

Feeding plants isn't just try this or that; without any idea what the plant needs. You shouldn't wait for a deficiency or burn to fix the ratio on your nutes.

There is not that many people that can help you with the science side of putting in a proper ration of nutes in the feed for your plants. Beware of fads. Look up fatman.

ihatefoxnews said:

Look up fatman.

Click to expand...

Any way you can send him by one of my threads or have him PM me? I looked around a bit and couldn't find him. I am struggling to find something these plants like. I just skipped putting in CalMag this time and tried upping the dose to the recommended factory specs. I checked it out with the manufacturer again and they say that the "soft" water line should "need no additives" like CalMag for example. They also will not respond to any question concerning MJ so I'm left in the dark to guess and check. I put so much work into a very high end custom aero setup, only to have freakin nutrient problems which I don't understand. I'm mechanical, I can build a nice setup (check out my control panel I made into a metal shelf unit), but my chemistry knowledge of the plants is greatly lacking.

That's pretty, man. I wish I could be of some help, but I'm in the same boat as you. I've been using aqua flakes with a few additives. Had good luck so far. My first grow, in my old system went very well. I had zero yellowing of leaves at harvest time, which I was told is a sign of an extremely healthy plant. I just hope I get that lucky this time around. My theory, less is more. Good luck.

Yeah Mike I'm thinking of trying General Hydro's stuff. I read somewhere that people who are battling defieciencies have tried the simple Lucas Micro Bloom mix and it cleared up yellowing and brown spots. Plus it would be hella cheaper too. My first time I used the recycling nutes from Canna and 3 plants in 1 50 gal tote. I had this sitting on a drain reservoiar. The roots collected on the bottom and made like a root scrog since it was a short container. I had way better results and no dieing roots. Now with the roots hanging in open air in a can of their own.......problems. Coverage problems ie. dieing or drying up roots in spots that mister heads cant hit. The freakin roots grow straight to the damn mister heads. I even tried turning them a half turn every day but then the parts not being sprayed will start to dry and die. Grrrr...... frustrating but not giving up at all, too much money invested!!

JP

your system looks sweet, I answered your question to the best of my ability on my thread.

JediParadox said:

Any way you can send him by one of my threads or have him PM me? I looked around a bit and couldn't find him. I am struggling to find something these plants like. I just skipped putting in CalMag this time and tried upping the dose to the recommended factory specs. I checked it out with the manufacturer again and they say that the "soft" water line should "need no additives" like CalMag for example. They also will not respond to any question concerning MJ so I'm left in the dark to guess and check. I put so much work into a very high end custom aero setup, only to have freakin nutrient problems which I don't understand. I'm mechanical, I can build a nice setup (check out my control panel I made into a metal shelf unit), but my chemistry knowledge of the plants is greatly lacking.

View attachment 1918597View attachment 1918598

Click to expand...

The CalMag isn't necessarily going to have to do anything with the water your using. I'm using Coco and hydroton. The gent I'm mentoring under that suggested the coco told me that using coco I would need CalMag otherwise my girls would get deficient.

RavenMochi said:

The CalMag isn't necessarily going to have to do anything with the water your using.

Click to expand...

Can you elaborate on why please? I thought the softer or less ppm the water you start out with the more nutrients and CalMag you can put back in, right?

RavenMochi said:

The gent I'm mentoring under that suggested the coco told me that using coco I would need CalMag otherwise my girls would get deficient.

Click to expand...

Wait I'm confused what are you trying to tell me here? Is it relevant to aero?

aerojunkie said:

JP your system looks sweet

Click to expand...

Thanks, appreciate the compliment was alot of hard work.

aerojunkie said:

I answered your question to the best of my ability on my thread.

Click to expand...

I looked at you links and I don't really understand all the ratio's of Macro's and Micro's and so on. Thanks though

I may have missed something but I did not see your PH level listed on your thread. What PH are you maintaining? Looking at your root hairs your misting schedule looks fine. What I would recommend is changing out your res. Add nutes first, Ph your batch to 6.0 and watch the new growth of your plants. If your running DTW dont worry about monitoring your res. other than bleaching or adding H2O2 or silica. If your recycling, check it at least once a day but best to do it right before lights out and right after lights on.

PH is extremely important. You can have all the nutrients required for growth but if your PH is off your plants will lockout nutes and begin to show signs of deficiencies. Forgive me if you knew this already. Good luck and keep me posted.

aerojunkie said:

What PH are you maintaining?

Click to expand...

I keep it at 5.8 on dot. I have let it swing up to six but then I usually bring it back down with a little ph down. I mixed a new batch of nutes, this time I mixed it to factory specs which calls for bout 700ppm in late veg. Then I dumped in a shitload of CalMag and brought it up to like 850-900. Then I ph corrected it. Next I added more RO water to the res. until I got the overall ppm diluted down to exactly 500ppm. I checked it this morning and they have all turned back nice and green and the leaves are all reaching for the light again. Never tried H202 yet, think I should? I don't recirculate it's DTW.