Help! Plant Wilt In Hydro?

Cugine

Cugine

Well-Known Member
I hope I fixed this problem this morning but would like to ge some opinions. I recently switched over to flowering: 12/12 light cycle (been on it for about a week). Well, my plant seemed to wilt and droop over night and it hasn't seemed to take up alot of water recently. This morning I checked the ppm again ..it had jumped to about 1900. I only had one large air stone in the bucket (5 gallon). I did a flush and nute change and added 2 more air inputs and airstones. I hoping it was just a dissolved oxygen issue. Other than that problem today the plant has been looking great. Has this happened to anyone before in a DWC setup?
 
chabnock

chabnock

Well-Known Member
Have you done a good flush of your grow medium. What is the PPM you are shooting for when you change nuts?
 
K

kindprincess

Well-Known Member
are you using any additives? your plants can take those ppms without much problem, i think there's something else going on.

please tell me you're not using h2o2....

kp
 
nongreenthumb

nongreenthumb

Well-Known Member
1900 ppm is way too high thats scorch your plants territory. i think that its possible that your plant wasnt getting enough oxygen so they are in effect over watered.
 
Cugine

Cugine

Well-Known Member
kindprincess said:
are you using any additives? your plants can take those ppms without much problem, i think there's something else going on.

please tell me you're not using h2o2....

kp
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I'm only using GH 3-part and having to add a samll bit of pH down daily. I have nevr used H2O2 until this morning when I suspected low oxygen levels. I also added 2 more air inputs and chilled the water down. I doubt I will continue using peroxide but I am hoping it would give it a temporary oxygen boost it seemed to need. Its "lights out" right now..i'm hoping all is well.
 
Cugine

Cugine

Well-Known Member
Well its been about 13 hours since my discovery of my wilted plant. In those 13 hours I have, flushed and changed the nutes, added h2o2, and learned to see in the dark thus adding cold ice bottles to the solution. The plant is about 95% back to normal...the test is to see how she looks after having light for 12 hours.
 
Cugine

Cugine

Well-Known Member
Ok...did a nute change. Added h2o2, added ice bottles to chill temps and put in 2 more air inputs. Looks about 95% better. The test will be after being under 12 hours of light
 
potroast

potroast

Uses the Rollitup profile
It sounds like you may not be topping off your bucket with plain water, to compensate for the plant taking up more water than nutes, so each day the ppm goes up until it reaches a toxic level.

HTH :mrgreen:
 
Cugine

Cugine

Well-Known Member
potroast said:
It sounds like you may not be topping off your bucket with plain water, to compensate for the plant taking up more water than nutes, so each day the ppm goes up until it reaches a toxic level.

HTH :mrgreen:
Click to expand...
I think you are partially right but I now believe my problem has been having to add ph down to try and maintain 5.8 thus driving up the ppm. I did some reading from Ed Rosenthal . I think I will be fine running pH levels between 6.3 and 6.8 which I could easily do without adding alot of pH down,
 
potroast

potroast

Uses the Rollitup profile
I think that Ed was talking about pH for soil, as that is a good soil pH range. A good range for hydro pH is 5.5 - 6.2.

HTH :mrgreen:
 
Cugine

Cugine

Well-Known Member
I took this from one of those "ask ed" articles in CC.
Marijuana does great at a pH of about 6.3 in most hydroponic units. At this pH all of the nutrients are readily available and are most soluble. In the unit using rockwool cubes the pH should be lowered a bit because the cubes are not inert, they are quite alkaline and raise the pH of the environment. Try using a water solution of 6.1. I have read hydroponic manuals that call for much lower pH, as low as 5.8. However, when I experimented with these low numbers I found growth to be stunted.
Click to expand...
While the plant seems better, she is still not right. She wilts much more when the light is on but heat does not seem to be an issue. I only started having issues when I went to flower. I'm using GH 3-part at 1:2:3
When I mix my nutes, its about 1300ppm, after using it and still having wilt, I diluted to about 1200 ppm. Still had wilt but some small improvement so I have diluted to around 800ppm.
I keep the solution at about 65-70 degrees and have 3 air inputs. I also noticed some purple in the stems and viens this morning. Not sure if its part of the problem or a by-product of the wilt issue. Some of theolder leaves are starting to yellow a small bit.
I'm starting to be at a loss here. I would be glad to take any suggestions :confused:
 
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