DWC - First Grow... Day three and already killing my plants!

McCambletron

Active Member
HELP!


Overview:

1. Curling crispy looking tips, yellowing leaves, and browning on the edges.

2. Clones may have been left in high pH nutrients sitting in a tray (due to bad pH meter). Water was then changed to plain pH balanced water for 24hrs.


3. Clones are now in 280ppm DWC unit, continuing to brown/curl, also looking droopy.
Water is RO-filtered, but TDS meter says it's 80ppm as it comes out of the filter.

4. Water level in DWC is 1.5" below pots, Rockwool is 1.5" above bottom of pots. Rockwool cannot be raised as the top is already flush with the top of the pot (barely covered in Hydroton).


5. Temps are only around 70º-73º. My light is 600W MH and 24" from plants.


6. I've been spraying them with diluted Neet oil once daily because there's a lot of gnats in my neighborhood.




Details:

I just purchased some beautiful looking well-rooted clones the other day for my first grow, but now after three days in my care they're already looking sickly.

For the first two days I had them sitting in a tray while I got everything set up in my closet. They started to get burned looking tips that were curling upward, turning light green/yellow, and getting some brown spots along the edges of the leaves.


I couldn't figure out what was going on because as far as I could tell, all of my levels were good, but that's when I started to question the accuracy of my cheapo $80 pH/tds/temp meter from eBay.


I used a liquid pH test and found that my nutrient solution may have been in the mid-6's. When I tried to re-calibrate my meter it started telling me that my 7.0 calib solution was 2.0, and wouldn't allow me to adjust it with the screw to be calibrated.


I figured this was an issue of lockout because of high pH nutes, so I replaced them with plain pH balanced water for a day (while still in the tray).


Yesterday, they still weren't looking very good, and a couple roots poking out the bottom appeared to be getting a little brown... So I decided to drop them into my DWC system to get some O2.


My nutrient solution is currently at around 280ppm, although I'm starting to wonder if the TDS part of my meter is fucking up as well.


My new problem appears that my rockwool may be too low in my netted pots. It's only an inch and a half from the bottom of the pot, which is only an inch and a half above the water line. Because they're 3" cubes they can't be raised further as there's barely any hydroton covering the top of them.


Do they look over-watered to anyone? They look a little droopy to me, but the leaves feel kind of dry; I'll be lowering the water level soon.

:wall:
 

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I usually avoid using Neem Oil on such young and tender babies.
A side note about PH meters... mine reads a about 1.5 to 2 full points higher than the actual PH unless I let the temp of the probe equalize with the water I'm testing. I just let the stick meter sit it the water for about 20 min before I turn it on and look at the display.

Best 'o luck!
 

McCambletron

Active Member
I usually avoid using Neem Oil on such young and tender babies.
A side note about PH meters... mine reads a about 1.5 to 2 full points higher than the actual PH unless I let the temp of the probe equalize with the water I'm testing. I just let the stick meter sit it the water for about 20 min before I turn it on and look at the display.

Best 'o luck!
Thanks for the tip. I've never used any of this equipment before, and unfortunately my cheap meter's instructions are all in broken engrish.

I'm going to attempt recalibration in a little while after giving the electrode time to equalize temp like you said, and then see if I can get some reasonable readings out of it.

I brought my water down to about 2" below the bottom of the pots.

Plants are still looking worse by the hour. Getting some corkscrewing on a couple leaves.
 

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Cali chronic

Well-Known Member
oh geez talk about cloggin stomata and suffocating them...oil in the stomata? gnats? Flystrips son Flystrips Spritz em and see em stick. Ph water distilled is usually at 7 and so is bottled. Bottled has minerals and such. Your clones-- just went thru one of the hardest surgeries in their life and you got them huffin neem oil. STOP! get a water soluable chelated foliar feeder ( i use big bud and bloom from a preferred Nursery huge potassium as it is needed) after you spray the neem oil off with clean water! watch your lights bring them up and away or on the skirts of the canopy give them about 800 lumes at the top for about a week keep the humidity up a bit with a spritz couple a times a day (not a lot)
The crank it up--- you got to harden those clones off before you take them out of ICU and put them in the game with all the booster shots from the CDC. smiling the whole time I wrote.
 

McCambletron

Active Member
Hey, thanks. I just sprayed them down with clean water to get the oil off. The guy I bought these clones from insisted that I get neem oil, but he neglected to mention (and I neglected to ask) whether I should start using it right away or wait until they're established. I'll get some fly strips, or yellow cards put out if I start seeing gnats (I haven't yet, just being cautious).

I haven't purchased a foliar feeder because funds are tight for the next couple weeks since I spent so much to get everything ready; is there anything else I could use? Can I get by without it for another ten days? If not, I'll pawn something if I have to... haha.


600w Light has been raised to 36" above plants, is this enough?
The canopy (if you can call it that) is only 68º.


Neem oil has been thoroughly sprayed off of all leaves.


Water: Still 2" below pots


Meter has been re-calibrated and MIGHT be accurate:
Currently @ 270ppm, 5.75pH


For some reason my RO water starts about 70-80ppm, but I have extremely hard tap water here.
 

McCambletron

Active Member
Continuing to get worse.

Does anyone have any suggestions on how to stop or slow what's happening here?

Any ideas on what to try?

I'm currently following Cali Chronic's advice, but plants haven't started responding yet.

Using Rhizotonic as foliar spray @ 170ppm... its 0.5% nitrogen and 0.5% potassium. Probably not enough, but this is all I have. Does anyone think this is a bad idea for any reason?

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McCambletron

Active Member
A few updates:

My reservoir temps have been hovering between 69-70ºF. I live in Southern California so I don't think reservoir temps are going to be enough of an issue to warrant a heater, we've just had a cold week...

I use two air pumps... one 40L/min, and one 70L/min. I think there's plenty of air, but correct me if I'm wrong. Reservoir is about 25gal (I know its verging on too small for 6 plants, but planning on expanding to recirculating after this first grow).

Right now my best guess is that I had some lockout problems early on that I never recovered from, and I also think that I may have been experiencing some wind burn because of the way the air was circulating, and the speed that the fan was set.

What is it that youre supposed to do in case of lockout? Are you supposed to go to zero nutes? Until new growth emerges? I read somewhere that I was just supposed to empty the res and refill with low ppm. Unfortunately I emptied the res this morning and replaced it with 220ppm nutes... but if that's no good I will empty and fill again as soon as I get home. I'm at work and won't be able to do this for a while, and still need to wait 4 hours for the RO filter to fill the res after that. :( I'm terrified that I'm going to lose all of my Querkle girls.



 

bigsourD

Well-Known Member
Freedom, are you saying NO nutes at all?
Yes. Stop giving them nutrients, the last thing they need right now. Replenish them with fresh water, and hopefully you havn't damaged to roots too bad.
 

McCambletron

Active Member
Damn. I have to figure out how to get home...

If I don't leave work its going to be a good 12 hours before I can get fresh water in there.

The last time I looked, the roots appeared ok... All white as far as I can tell. Will they turn color if damaged by lockout, or is that just root rot?
 
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