Save my babies - QB & DWC

[ver151set]

Problem: Growth seems to be stalling, leaf discoloration possible Ca or Potassium def?

Medium/grow method: DWC

Feed: and supplements used: Changed res yesterday after noticing issues getting worse.
Added a total of 10ML Calimagic, 5ML each of GH Flora GMB, 4ML Armor Si, 8ML Hydroguard into 4 gallon of water resulting in 405 ppm @.5 conversion

water source: RO

Strain/age: Dutch Passion Auto Blueberry, sprouted on 5/10

light used: HLG 288v2 3000k 260w kit, currently tuned to 35k lux at canopy

Climate: 48% RH, 84F, 77 Res (no signs of rot, slight discoloration from micro)

Additional info: Any help is greatly appreciated, Im hoping these babies can pull through

 

[Simplicio]

They look over-fed, over-heated, and under-humidified to me.
But your present ppm looks ok.
The Vapor Pressure Deficit chart will tell you that the plants will be happier if the humidity is at least 65%.
High humidity will reduce the transpiration that those high temps cause, which leads to too much nute uptake.
I keep humidity between 60-70% thru harvest, and never have bud rot in hydro.

 

[ver151set]

Currently with my exhaust running, an oscillating fan in tent and ultrasonic humidifier I struggle to get the rh above 50%, even with the speed controller for exhaust set to low. I know the the temp will drop if I increase the exhaust but I figured that would drop my humidity further. Outside the tent temps are at a pretty constant 75 degrees and 52% humidity

 

[Simplicio]

Currently with my exhaust running, an oscillating fan in tent and ultrasonic humidifier I struggle to get the rh above 50%, even with the speed controller for exhaust set to low. I know the the temp will drop if I increase the exhaust but I figured that would drop my humidity further. Outside the tent temps are at a pretty constant 75 degrees and 52% humidity

I've got several ultrasonic humidifiers, and have run as many as 3 at once to keep the winter humidity above 65%.

 

[ver151set]

Wow, looks like I need to get another. Any idea why the brown spots are spreading? On upper leaves Im getting small brown spots that worsen and end up looking like the real jacked up leaves on the lower portion of one plant. Odd thing is only one of two plants are showing these spots, and they share a resevoir. Im guessing different phenos with different nutrient requirements?

 

[Waira]

- pH? [HASHTAG]#1[/HASHTAG] most important thing in hydro, the line is very fine for full availability of nutes,.... also, the res. is a bit too warm, makes for low O2,...
Get us pics of affected leaves, these aren't quite clear enough to tell,.. looks like P defc. to me though,...
VPD is off as well,lower the T and/or raise RH%... Check out the reference section for an article on VPD, good info, several key dots will be connected there, trust me!

 

[ver151set]

Every 12 hours or so I have to adjust from 6.1-.2 down to 5.8, ppm seems stable, ph rises, and water drops so one would think nutes are dialed in but from everything i look at i seem to have some deficiency. One plant is all green but somewha

My tent is rather small (2X3) and when my 6" fan is on it raises tent temp likely because instead of hot air rising and being sucked out its just all mixed together well so ive turned it off again. Another side effect of my fan on is increased res temps, without the fan cold air pours in over the res instead of hot air being blown around it.

Added a humidifier and got it to 79 and 66%

Ill get a few more close ups tomorrow, time for a smoke and some sleep. Hoping I dont see it spread too much in the a.m.

Thanks for the help guys, Ill keep ya posted

 

[ver151set]

Okay so this morning ph had only risen to 5.9, ppm @ 408, temp @ 81, rh @ 55%

Plant 1 (with leaf browning) seems to be getting worse, brown specs are spreading throughout

Plant 2 is still droopy and sad looking with some slight yellowing on a few random leaves

Feeling pretty discouraged right about now.

I think Ill mix up a new res tonight, any input on my recipe?

 

[ver151set]

Welp I changed the res, same ppm but different ratios. Based it off Lucas this time instead of 1:1:1 flora

Ro water 11 ppm
Calimagic 7.5ml 160 ppm
Micro 8ml 302 ppm
Bloom 16ml 410 ppm
Hydroguard 8ml

Temp 79 55%rh

 

[Animatey]

Brown spots look like calcium deficiency to me, though I'm not sure more cal mag will help.

Are you sure the roots are healthy?

My guess on the droop would be rez temps.

Your ppms are only 400? That seems pretty low for plants that size but they look green enough to not be underfed.

If those were mine I'd focus on getting the rez temp down and then leave the feed alone.

Check the ppm daily and it should drop slightly or stay the same. If the daily ppm check shows its going down then up the feed, if ppm going up then lower the feed but try not to make drastic changes to the rez.

A fan should not increase temps... Maybe need a new fan. I would have something moving air in there.

Good luck!

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