Help! <<High quality pictures included>> Shrunken new growth in Recirc DWC

[smokedoja]

Help! <<High quality pictures included>> Shrunken new growth in Recirc DWC

Hello! I am in need of some advice, first off I'm running an Undercurrent recirculating DWC system, with Dutch Master Gold nutes. PPM is at 700, PH is at 5.7.
The plants are 21 days old, and thriving, except 2 of the 12 started showing shriveled new growth, I couldnt have been going on for more thant 5-6 days.

Pics of what I'm talking about:



From a glance they look perfectly healthy, but under close inspection you can see the problem:


I run a water chiller, and the roots are glistening white. The only thing I'm wondering about is that some nutrients bubble up over the edge of the bucket, then evaporate then more nutrients bubble up and evaporate and so on, it forms a crust of nutrients around the edge.

Like this:


Some of the fan leaves were resting in that crusty nutrient muck, I was thinking maybe it absorbed a bunch of the concentrated evaporated nutrient stuff, and it locked up something important, can that even happen?

Here are pics of the fan leaf that was in the nutrient crust and the piece of plastic I put to prevent further absorption:


What should I do? I'm so fucked, should I put them in separate buckets with diluted nutrients? no nutrients? or what.

PLEASE! HELP IF YOU CAN!







I'm going to fill this out too:


How long has this problem been going on?
5-6 days
Are you growing in a PVC grow tent?
No
What system are you running?
Undercurrent 12xl Recirculating DWC
What STRAIN are you growing?
Northern Lights
What was the establishing technique?
From seed
What is the age of your plants?
21 Days
How long have they been in there mixture they are in now?
21 Days
How tall are the plants?
9-12 Inches
What PHASE are the plants in?
Vegging
What Technique are you using?
n/a
What substrate/medium are you using?
Hydroton
What is the Water temperature?
68-69 degrees F
What color are your roots?
Glistening White and not slimy
What Nutrient's are you using?
Dutch Master Gold with ADD.27
How often are you feeding?
n/a
How often are you giving nutrients?
n/a
If flowering, when did you switch over to using Bloom nutrients?
n/a
What is the TDS/EC/PPM you are using?
700 PPM
What is the pH of the "Tank"?
5.7
How often are you testing your pH/PPM/EC/TDS?
2 times per day
Are you sure your calibration is correct on your equipment?
Yes
When was your last watering?
n/a
What is your water temps?
68-69 Degrees F
When was your last feeding change?
5 Days ago
How often do you clean your system:
Every 3-4 weeks
What size bulb are you using?
1000 Watt
How old is the bulbs you are using?
6 months
What is the distance to the canopy?
18-20 Inches
What is your RH Factor(Relative Humidity)?
35%-40%
What is the canopy temperature?
79 Degrees
What is the Day/Night Temp?
67 F - 75 F
What is the current Air Flow?
800 cfm exhaust fan in a 7'-17' Room
Tell us about your ventilation, intake exhaust and when its running and not running ?
The fans turn off at night
Is the fan blowing directly at plants?
I have two oscillating fans that blow indirectly from each corner
of the room, gently ruffling the plants
What water are you using?
I'm using R/O water, comes from 300 PPM Tap to 0 PPM after filtration.
Has plant been recently pruned, cloned off of or pinched?
No
Have any pest chemicals been used? If so, What and When?
No
Are plant's infected with pest's
No

 

[RubeGoldberg]

testing 2 times a day for PH? are you also adjusting 2 times a day?

 

[vorzh]

How often do you clean your system:
Every 3-4 weeks

Every 6-9 days would be ideal. 3-4 weeks without a nute change/sterilization is an accident waiting to happen in my book. Not sure if this is what is causing your problem though.

I would clean out EVERYTHING, sterilize with h2o2 to get rid of any pests that might be lurking under your radar as well as salt buildups, then refill your system but with 1/2 strength nutes than what you're used to... this should allow you to better isolate the problem (if it continues)

 

[smokedoja]

testing 2 times a day for PH? are you also adjusting 2 times a day?

Nope just checking the PH, not adjusting lol

Every 6-9 days would be ideal. 3-4 weeks without a nute change/sterilization is an accident waiting to happen in my book. Not sure if this is what is causing your problem though.

I would clean out EVERYTHING, sterilize with h2o2 to get rid of any pests that might be lurking under your radar as well as salt buildups, then refill your system but with 1/2 strength nutes than what you're used to... this should allow you to better isolate the problem (if it continues)

doing a rez change every 6-9 days would be insane, I've known people to never change the reservoir the whole way through! I thought that was insane, I've heard 10-14 days, but with recirc dwc I've heard you can go longer, but either way I'm doing a rez change tonight, and I'm going to flush the 2 problematic plants with florakleen and then they'll have a fresh nutrient bath to soak in after that.

 

[SumDumGuy]

Hi SmokeDoja. If you were growing from clone then I'd see a major concern but when growing from seed each plant is different. Some may not like your settings as in pH EC and so forth while others may thrive. IMO you are not bad at all. Changes in pH EC will cause all your plants to adjust so for the simplest solution raise your hood bout 12" for a week. It'll release some stress and the others may like the break as well. May surprise you. Good luck. Try keeping your rH above 50 as well. It'll help build more quality in the foliage.

Other than that you're doing a bang up job!!

Edit: I'm very sorry. I didn't see top 4 pictures!!!!!!!

 

[redspaghetti]

Ph problems

do yourself a favor,
visit a fish store, get one of those liquid droplets to test PH for fish
since fish need a more stable Ph and environment then plants, this
would really help you solve the problems

Check your ph with you pens and double check again with the
liquid to make sure you PH pen is calibrated correctly.

Now what would be best is flush those ladies, start a new nute
programs at very low dose. make sure they are healthy again
before you add any other additives.

hope this help

cheers,