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Old 09-19-2018, 05:35 PM #11
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looks good to me.
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Old 09-21-2018, 11:03 AM #12
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Quote:
Originally Posted by Douglas.Curtis View Post
The temps are going to be your biggest issue. Unless the solution temp is below 70F, any roots sitting in it will begin to rot. If you have access to cold air, put your airpumps where they can pump the cold air through your nutrient solution.


Sounds like you're off to a decent start. Keep reading the stickies in all the different forums.
Water temps below 70f are NOT always needed! The environmental conditions where you are growing will affect if you need to lower your nutrient solution.

I have never had to lower my waters temp in a hydroponic system.
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Old 09-21-2018, 11:13 AM #13
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Originally Posted by OrsoMarsicano View Post
I selected only the strongest plant.

Unfortunately, I had problems setting my ec tester and the plant had some nutrient problems (EC too low, 250ppm in O/W)

09/10 situation:

View Image View Image View Image
That looks healthy despite the lower ppm level that your nutrients where at.

you can also clip the tips of the roots like how people top the grow shoots to make the plant bush out. This helps to make a larger root system for the plant.

You mentioned about selecting the strongest plant out of the three. Are you growing feminized seeds? If not, by only growing out only one seed you have the chance of it being a male instead of a female.
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Old 09-21-2018, 01:35 PM #14
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Hi Ganoderma,


there is a lot of confusion about the water temperatures.
I have watched many videos of dwc systems and many people say that the water temperature
should not exceed 20°C (68F). Other people do not care about temperatures.
It would be nice to do a test with clones to see the differences. The seeds are feminized! (Dinafem Bubba Kush CBD)

I hope my English is understandable, if it is not, I apologize.
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Old 09-21-2018, 02:08 PM #15
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From what I've seen over the years, is that when people where running large undercurrent systems they where the ones that started talking about water temps. They wouldn't use air pump/air stones in any of the buckets. Those are the folks that started the whole water temp thing. Then you have newer folks who come along and just think thats how it must always be done.
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Old 09-21-2018, 02:47 PM #16
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Quote:
Originally Posted by Ganoderma View Post
Water temps below 70f are NOT always needed! The environmental conditions where you are growing will affect if you need to lower your nutrient solution.

I have never had to lower my waters temp in a hydroponic system.
You need to differentiate between roots-in hydro, and roots-out hydro temps. Roots-in systems are much more sensitive to temperature than roots-out. It's advised to keep your res at 79F and below, so you stay out of the potential danger zone.


Roots-out systems can tolerate much higher temps, as previously mentioned in the thread. The OP is using a roots-in system, so without going sterile res, it's advised to keep the temps low.


I've been running non-sterile, roots-in DWC for 15+ years, and I assure you I know exactly what I'm talking about. lol
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Old 09-23-2018, 08:02 PM #17
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I do about the same as Douglas.Curtis I keep my ppm about 700-800 in bloom and 400-600 in veg.

1000-1600 seems very high to me, every time I have run 1000+ my plants don't like it.
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Old 09-23-2018, 08:14 PM #18
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Quote:
Originally Posted by Hydro8 View Post
I do about the same as Douglas.Curtis I keep my ppm about 700-800 in bloom and 400-600 in veg.

1000-1600 seems very high to me, every time I have run 1000+ my plants don't like it.
The most commonly overlooked factor in hydro is transpiration rates. I'm betting your transpiration rate is up there with mine. I've been writing a tutorial on res management for a proper pH swing, and I'm unable to write it without including transpiration.


(Within reason) The higher the transpiration rate, the lower strength feed you need to get the job done. You go through more nutrient solution, but the end result is a much cleaner product. In my opinion anyway.
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Old 09-25-2018, 11:36 AM #19
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Hy guy!!


weekly update:


last week was like that:




Saturday I installed the chiller and finally the water temperature is fresh (21°C-70°F).





The plant seems to have much appreciated, yesterday the plant was like that:






PH 5.8 - EC 490/500 (last week was 600)



The plant is very compact even with the LED at 40% of the power (40w)
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Old 09-25-2018, 11:37 AM #20
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I'm continuing LST and I cut a few leaves to make space in the center of the plant.


What do you think? Next week I would like to switch to 12/12

Do you have any suggestions?

thank you a lot
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