hello everybody
it seems that i have a little problem, does anyone know what it could be?
DWC
3 week
AN nutes @ 1/4 strength / ppm was 900 changed water and used less nutes now 600 ppm
PH 5.8
temp 20 celsius and water 18-20 celsius
greenception gc 4 @40cm 18/6
and roots look fine no slime or smell
When was the last time you changed out the solution in your DWC? 
Yikes, what’s the white on the leaves?
when i checkt the ppm this morning and it was at 900 i changed it asap.
and i noticed that my ppm meter needed to be calibrated so the ppm could have been way off.
so the last change was 3 hours ago.
When I was running DWC bubble buckets, I was changing mine at least once a week whether it needed it or not. 
i have been doing the same just in case 
my best guess would be nute burn, what do you think ?
that is exactly what i want to know
, any ideas ?
Leprosy? I don’t think plants get that
Have you had any major changes. I had something similar happen when I put my plants in totes, while I was re building my system. 
PPM 100-200 and plant looks like the netpots touching the water, needs an air gap.
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I agree with @Member420 water level may be to high. Leave 2 inch gap between net pot and water. Water being to high drowns plants and makes droopy leaves.
Temp is a bit low in my opinion as well. Water temp is good.
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I guess that I assumed that had already been checked. There I go assuming things again

Ok, So now I’ll wait I guess.
Hope that will solve the problem, will post a update if some thing changes.
Thanks for the help 
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It started after my first reservoir change
@Member420 there is a gap about 3-4cm.
There is a water level tube on the side where I marked the pot and 3 cm below the net pot.
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You are assuming right 
And thanks I’ll check out you grow
so not having a gap in the water will cause the leaves to droop or the white on the ends of them ?