HELP! Having some problems with my plants in aero!

MisterBlue

New Member
I do have some problems with my plant. Today the EC-meter was showing 0.86 in the reservoir, and 0.6 by the roots. The ph was lying at 6.2. I changed the water in the system with a ph of 5.3 and Ec at a little less than 0.5. I use General hydroponics nutrients and Canna ph down. The system is spraying directly at the roots(is this right?)

I used airstones, but took them out. Seemed to increase ph at a fast rate when it could go from 5,2 to 6,2 over night.

Temperature in grow room: 21 C
Air moisture in grow room: around 40-60%
Water type: soft springwater, no chlorine or what ever. Ph is 7 dead on.
Light: 600w metall hallide.
Strain: Bubblicious

What am i doing wrong? Is my problems caused by too much nutrients? Is my ph wrong? Or anything else?

Can anybody please help me? Used enough money on this shit!

Friendly regards from a bloody noob!
 

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MisterBlue

New Member
I bought a new ph- and ec-meters. Separate. So they have been used for about 3 weeks. Calibrated them once a week. No new batteries yet. How often should i change them?

Start with root zone how they look? What do you mean? How the roots are looking? If so, they are just looking fine. Crazy long, but fine. A little brown, but its just discoloring from the nutrients.
 
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Atomizer

Well-Known Member
I would give them some magnesium sulphate/epsom and put the pump on a timer. GH nutes wont cause brown discoloured roots if you dont overwater
 

Dumme

Well-Known Member
I bought a new ph- and ec-meters. Separate. So they have been used for about 3 weeks. Calibrated them once a week. No new batteries yet. How often should i change them?
There's nothing special about the batteris in these meters. Theyre normal batteries, so about once every 6-9months, although ive had some last a couple of years. It's all about amount of use. As the batteris go dead, they throw the meter wack! I replace mine with rechargeable. Sometime you get dead batteries from the store. Not saying this is the case here, just something to be aware of.
 

MisterBlue

New Member
I had magnesium in about two days ago. I used cal-mag and epsom. The good green color is coming back slowly, but it seems like the burning wont stop. Are there still to much nutrients in the water?

My sprinklers are spraying directly at the roots? Is this right or should only the bottom roots have water?

How long would it take for the plants to get the good green color back?

Thank you for the answers. It is good help:)
 

Dumme

Well-Known Member
It looks like an aero-NFT hybrid. Is water in the bottom, or is it draining before it collects?

My sprinklers are spraying directly at the roots? Is this right or should only the bottom roots have water?
As long as the roots are in water, it doesn't mater.
 

Dumme

Well-Known Member
I don't know what version on GH nuts you're using, but I don't think it's CalMag.

If burning is progressing and I were you:

Complete water change. Start from scratch, tipping the balance of calcium, magnesium, and phosphorus, really screws with the plants. Too much of one will lock out the others uptake, including "Fe" (iron).
 

MisterBlue

New Member
I will change the water as planned tomorrow, and try to be more exact with the amount of nutes. I am using GH Flora series and Sensi Cal Mag Xtra from Advanced Nutrients.

How much should I use? Last timed I changed the water, I used half the amount (3.5ml/10l) of the GH schedule.
 

Dumme

Well-Known Member
I don't see a Calcium problem and Calcium toxicity leads to a lockout of Mg, Mn, K, Fe.

Epsom salt is Magnesium Sulfate.. (me telling you this will work for Mg is not to be confused with me saying that Mg is the problem)

I believe in only feeding what the plant is asking for. If you've been using Sensi CalMag from day one, I suspect you've locked out Phosphorus uptake. No to be confused with Phosphorus NOT being present. You probably have enough in your system, just locked out.

Furthermore, I can't tell from the Avanced Nutrients website what version of Iron Chelated they used in it, wheather it be FeEDTA, FeDTPA, or FeEDDHA. I suspect the first. FeEDTA gets lockout around 6.1-6.4 and where you had pH problems...

It's imperative the pH is under control while growing, not to be confused with the natural fluctuations of pH with water uptake.

Don't listen to me, I'm just a Dumme...
 
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Dumme

Well-Known Member
The chart I posted above, believe it or not, is set up pretty good. "Blue" being the top used and most common problems (Macro Nutrients), then the pink (Minor Nutrients), followed by the yellow (Micro Nutrients). It truely is a useful tool for the new guy.
 

oill

Well-Known Member
There's nothing special about the batteris in these meters. Theyre normal batteries, so about once every 6-9months, although ive had some last a couple of years. It's all about amount of use. As the batteris go dead, they throw the meter wack! I replace mine with rechargeable. Sometime you get dead batteries from the store. Not saying this is the case here, just something to be aware of.
Last time you calibrated them??? PH meters can get way out of whack
 

AKGrowAreo

Well-Known Member
I run Aero NFT very successfully so I can at least try to help. Empty your res completely and scrub it out with bleach. Fill up your res with tap water and 4 ml per gallon of Clearex and ph it to 5.8, not 5.3. Let that run for a day. That will wash the built up salts from your roots and give you a clean slate to work with. Take everything you have bought from GH and throw it in the garbage where it belongs. Buds grown with GH taste fucking horrible. Trust me I used it for 3 years. Run with Botanicare or Canna. Botanicare is my preferred and its really easy and works really well in with aero grows. Once you have done all that if you haven't seen your plant improve in about two or three days then you'll need to toss it and start over. Message me if you want my nute solution. BTW, why are you using a medium? There is no need in Aero NFT, all it does is gives pests a place to live that otherwise would not have had anywhere to post up. Also keep in mind that you need to look to your new growth to see if there has been any improvement because those leaves that are already damaged will never come back.
 
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