HELP!!! My Babies are going to die!!!

[bigbob]

Ok let me tell you about my grow room first
I have a 600w hps using a lumatek dig balast running 24-7
The room is vented using a 600 cfm fan through a can-filter carbon filter...
Im using a drip system with irragation time 2 times a day 4am and 4pm for 5mins each...
my ferts are general hydro, "micro, gro, flor" using the light veg formula on side of bottle...
one oscillating fan going in the room...
the room temp is in between 75-80...
water temp is 70...
ppm is 920...
ph is 6.0...
They are inbetween 4-6in tall...
They have been grown from kali mist seed
started about 3 weeks ago...
changed water and nutes 4 days ago and flushed all plants...
at first i thought overwatering and it was last week, but i have that undercontrol now... but I know there is something else to this...
Please help me...
Here are my babies...
Plant #1




Plant #2





Plant #3





Plant #4

 

[monkeyman]

Nute burn maybe?

 

[Blunt_69]

PPM 920!!!! Uh ya man you burned them. Bring that level down to 400- 500PPM

 

[bigbob]

ok added ph'ed water and got ppm down to 450...
also flushed cubes...
thanks for the advise...
hope it works

 

[monkeyman]

Don't use the directions on the label. From what i understand its way too strong. Do a search for lucas formula on here and use that. It's a lot better from what i understand.

Also, I don't really have anything to back this up, but intuition would tell me that you might want to give them nutes at half strenght for a few days while they clear some of the build up in their system. That's just a guess though.

 

[mace_ecam]

water source ppms? conversion factor?

 

[bigbob]

My water source ppms are 80 or just a little under that...
conversion factor?
do u mean the EC to PPM

 

[mace_ecam]

conversion factor?
do u mean the EC to PPM

yes, thats the way i meant.

 

[-VT-]

Also .... what is the relative humidity?

 

[igohydro]

Now your nute strenth is lowered you should maybe think about giveing em more cycles,as they could be doing with it.They look way to dry.

 

[bigbob]

Im not sure on the converion that they use, I have the continous monitering tri-meter...
um my RH is at 30-40%
and I just gave them one more 5min cycle at 10:00
thats three one at 4 pm, one at 10pm, and one at 4 am
with the lights out between 10am to 4pm

 

[-VT-]

30% to 40% RH...I'd say that's a tad low for veg phase...I have seen stress in most plants I have had in humidity that low...although one in particular (Mazar) seemed to like it arid...anyways low humidity can stress the plants and affect metabolism if severe, especially if combined with heat. The signs I saw were droopy "wrinkled" looking leaves...they lose "turgor"...and the stomata close up when RH is too low...just wanted to share my experience on the RH side of it...good luck man

Peace

 

[bigbob]

I have a 160 cfm blower running all the time through a carb-filter and venting my fan..
its running all the time so i can create negative pressure in the room ie. no air escaping the carbon filter...
and I have a 44cfm can fan for when the temps or RH get to high...
so i how do i get the RH higher? I don't want them to high, but just right...
would a humidifer work? or would it raise it to much to fast?
and how much would a cheap yet good one be?
also I checked the roots today and they are a little brown or red,(im a little color blind)
Ill post pics tomorrow...

 

[-VT-]

I've heard anywhere from $20 to $40 for a good one. I have not shopped them thoroughly myself.

IMO...50%-60% RH is ideal. I lower my radiant temps to get my RH optimal for veg...

>>>also I checked the roots today and they are a little brown or red<<<

GH 3 part can stain the roots....specifically the Micro (the bloody red stuff...like syrup kinda)...the roots take in nutes through "osmosis"...the nutes will literally stick to the roots...staining them...this is fairly common for GH 3 part users...

Peace

 

[bigbob]

Thank you much man...
I thank you all

 

[igohydro]

Id still give em more cycles,she can take more.Id feed em every hour .

 

[Blackmelo]

has no1 noticed the 600cfm blower?

Wow man, that must be pretty loud.

 

[bigbob]

Its a 160CFM blower 4" on all the time...
then a 440 cfm in-line fan 6" with a speed adjuster that turns on when ever the room gets to hot or the humidity is to high...
That and I have it anchored to a thick piece of foam and I attached carpet as a sound lowering thing...
It doesn't get hot at all

 

[igohydro]

Micro aint red thats the bloom!