Stunted at 5 weeks into flowering

I have an indica and a sativa in Ebb'n'flow. I use GH (0-6-12) + cal-mag + flouralicious.
EC = 1.8
PH = 5.5 - 6.0
Temp = 60 - 82
Hum = 25-32 %
Light = 400w HPS on top
= 16 x 4ft 32w florescent on the sides (4 each wall)
Exhaust = 500 cfm

They did not grow a hair for about a week and a half .... they look mostly healthy, but on the side where the oscillating fan is blowing, the leaves are kinda burned and with lots of red/rusty spots. they show al kinda deficiencies and nutrient burn in the same time......the leaves look very dry (if I touch them ... i'm scare not to brake them)


The temp of my solution in the reservoir is pretty low. I do not have any thermometer for my reservoir, but I can feel that is cold every time when I check the PH. Do you guys think that might be a problem?

what distance between light and plants? might be too close. about 18-24 inches usually. Also humidity seems low. should be up around 50-60 i think. but im new to it.........

They are about 12 inch away.
But I'm sure that is not the reason why they stopped growing ....

i was just curious as to how they have stopped growing? are you talking about green growth like leaves and stuff, or do you mean the buds have stopped developing? i was just wondering what you mean by stopped growing..

i meant everything. Nothing is growing or developing for almost two weeks. I'm talking pics everyday and watch them so I can compare.....this is exactly how they looked 2 weeks ago.....this is how they look today.

ok.. so where is your ph levels at when you check them? i have also read about the same problem with spots and stuff on the side of the plant where the fan is blowing, but no one ever came up with a good answer as to why this happens, but i just thought that i would mention that i have heard of this happening to others.. they look pretty nice in the pix other than the spots on the leaves.

looks like a mg deficiency on the leaf with the spots.... unless you have critters which I will refuse to say so I don't increase your chances......(SM)......take a leaf off and check out the bottom real long and close with a magnifying glass and tell me what you see... I'd do a flush though.... water, water, then start your nutes regime at 1/4-1/2 strength...

how cold??

I did flush them and it got worse...
If I put the EC on 2.0, after a couple of days it drops to 1.7-1.8
If I raise it then the plant gives sighs of over fert .... so fucked up ,....

goin through the same thing bro , i did everything and it def gets worse, wait another couple weeks your leaves will be all messed up, but my stuff is still growing so screw it

ReAVeR said:

looks like a mg deficiency on the leaf with the spots.... unless you have critters which I will refuse to say so I don't increase your chances......(SM)......take a leaf off and check out the bottom real long and close with a magnifying glass and tell me what you see... I'd do a flush though.... water, water, then start your nutes regime at 1/4-1/2 strength...

Click to expand...

YES,, possible difficiency here and also I noticed that the leaves are drooping .. make sure the roots are getting enough oxygen by putting an air pump in there so as to blow fresh o2 into the reservoir at all times.. the temp of the solution seems ok.. this kind of pause can happen if the roots cannot uptake enough o2 to create new starches (OR it could be root-bound).. check PH every day, there could be something in the media that is causing it to change over time inbetween when you change the solution.. just a guess cuz there are so many potential causes with things like this.. even, I dare bring up bad genetics (?) ..
good luck bro

2nd vote for Mg deficiency...

EDIT:

lol ok..3rd for deficiency.

yea, for sure .. but mg def alone would not explain lack of any growth for 2 solid weeks.. but disregarding that for the moment, agreed there exists an mg def...

Right, I was actually just going to agree with you on a possible o2 issue with the roots. I hadn't thought of that till I read your post. The daily PH check is a good idea as well.

I thought is a mag def and thats why I added cal-mag. I also think that the roots have enough o2. I have airstone in both reservoires.

here are the roots

I feel for you man. The symptoms look like a calcium def. (plus some other shit that is starting to show) brought on by ph fluctuation. What medium are you using? Are you measuring 'run-off'? Did you check your roots?

If you look above you gonna see a pic of the roots.
I'm really starting to believe that is a unstable strain... I dont know what else....because from the beginning to finish they were in a "perfect enviroment" all the nuts that they need + cal-mag + bloom booster ... and still nothing. I flushed about 2-3 weeks ago and stil nothing .... I just cant find anything else .... i'm wondering if they'll die ...