Cannabis prombles

Hello,
I has been growing for a while but these last two batch has kill me big time.
Its appear to be under water, but other plants seem to be ok.
Also there are couple of that are yellow and dying (See pic 001 and 001a).
I'm soo frustrated that i can seem to figure out what's the promblems is.
Please help.

Here's my setup:
growing tent 5x9 with 3 600 watts hood.
Strain: Jack herer
Nuts: GH
Media: 6" rockwool.
Growing with Greentrees system.
Temp: 75 degree
Water Temp: 65 to 70 with chiller.

That Jack can be one hell of a feeder . Possibly with photos and more details of your nutrient regimen someone can assist you and get this issue sorted out .

whats your nutrient solutions PH?
Nutrient solution PPM?
How do your roots look? are they healthy?

75-F is to hot to run your nutrient solution. 65-75-F, 68-F optimal.
75-F is a Temp for cloning or seed germination.

PPM is currently @1600
PH is @ 5.4 - 5.7
As for the root i don't see it come at the bottom of buckets yet.
its in the rockwool and covered with hydroton balls.

nphra said:

PPM is currently @1600
PH is @ 5.4 - 5.7
As for the root i don't see it come at the bottom of buckets yet.
its in the rockwool and covered with hydroton balls.

Click to expand...

I'd try and drop the nutrient solution temps if you can get it around 70-F your plants should start coming back.
You could also change the nutrient solution to a lower PPM like 1/2 strength or even 1/4 strength or even just run water for a couple days until they recover.
IMO- I think your temp is causing most of your problems.

topfuel29, you probably correct on my problems.
I will try to lower both of my tempurater, Because i notice i have no problem durring cold season.
Please feel free to advise. Thanks

No problem man.
I hope it works for you.
Have a good grow man.