Interesting browning of veins overnight

[Smokeman710]

This happened over night. Plants seem very happy. Not sure what could be causing it. Im 7 days into flower
Nutrients: athena blended full strength.
temps: 79-83 day and 76-80 at night. (Set point is 80)
Humidity 65-73% (set point 70)
Co2 800ppm day. Off at night.
ppfd is about 600-750.

only thing I can think of is that I decided to skip a watering cycle because I felt I wasn’t getting the proper dry backs. Could this be a result of the ec in the medium getting to high from over drying? Usually nutrient burn starts at the tips in my experience. This is my first time running co2 and I know that changes a lot. I also have good airflow. While I’m writing this post I’m remembering something about needing more calmag with co2. Perhaps that’s the answer. I truly don’t know and am open to any suggestions. I am feeding on the lower side of the cal mag range because my tap water comes out about 200ppms or whatever ec that’s is. Thanks for any input! Otherwise plants seem extremely happy.

 

[dbz]

This happened over night. Plants seem very happy. Not sure what could be causing it. Im 7 days into flower
Nutrients: athena blended full strength.
temps: 79-83 day and 76-80 at night. (Set point is 80)
Humidity 65-73% (set point 70)
Co2 800ppm day. Off at night.
ppfd is about 600-750.

only thing I can think of is that I decided to skip a watering cycle because I felt I wasn’t getting the proper dry backs. Could this be a result of the ec in the medium getting to high from over drying? Usually nutrient burn starts at the tips in my experience. This is my first time running co2 and I know that changes a lot. I also have good airflow. While I’m writing this post I’m remembering something about needing more calmag with co2. Perhaps that’s the answer. I truly don’t know and am open to any suggestions. I am feeding on the lower side of the cal mag range because my tap water comes out about 200ppms or whatever ec that’s is. Thanks for any input! Otherwise plants seem extremely happy.

Looks like cal lockout or deprivation to me.

 

[Smokeman710]

Looks like cal lockout or deprivation to me.

Thanks for the reply, I’m leaning towards calmag deficiency. I can’t imagine it being a lockout with the plants being as healthy as they are because something would have to be causing the lockout and as far as I can tell everything is pretty dialed in.

 

[HydoDan]

Why cal/mag with tap water? Too much will cause lockout.. Looks like mag has locked out calcium..

 

[Hydro Hippie]

Is t

This happened over night. Plants seem very happy. Not sure what could be causing it. Im 7 days into flower
Nutrients: athena blended full strength.
temps: 79-83 day and 76-80 at night. (Set point is 80)
Humidity 65-73% (set point 70)
Co2 800ppm day. Off at night.
ppfd is about 600-750.

only thing I can think of is that I decided to skip a watering cycle because I felt I wasn’t getting the proper dry backs. Could this be a result of the ec in the medium getting to high from over drying? Usually nutrient burn starts at the tips in my experience. This is my first time running co2 and I know that changes a lot. I also have good airflow. While I’m writing this post I’m remembering something about needing more calmag with co2. Perhaps that’s the answer. I truly don’t know and am open to any suggestions. I am feeding on the lower side of the cal mag range because my tap water comes out about 200ppms or whatever ec that’s is. Thanks for any input! Otherwise plants seem extremely happy.

Is there a chance the pH of your soil is off or maybe salts have built up in your soil? I've had that look before when my soil was a bit too hot and the pH had drifted.

Maybe turn your lights down till you figure it out, it will slow the progression.

 

[PadawanWarrior]

Is t
Is there a chance the pH of your soil is off or maybe salts have built up in your soil? I've had that look before when my soil was a bit too hot and the pH had drifted.

Maybe turn your lights down till you figure it out, it will slow the progression.

pH was my first thought too. Was yours high or low when you had that issue? Was it organic soil?

 

[Hydro Hippie]

pH was my first thought too. Was yours high or low when you had that issue? Was it organic soil?

I can't remember if the pH was high or low, I would have to look back in my notes, I think it was high. I ran into a bag of Ocean and Forest that was way out of wack. It was literally the one time I didn't do a slurry test before use. I repotted my plants before flower, two days later they looked just like the pictures. Quick flush then repot into afresh mix and problem was solved.

I did a slurry test on the original soil causing problems and it was over the limit on my ppm meter.

 

[hotrodharley]

Developing magnesium deficiency. Not calcium. Can be addressed with foliar spraying. 1 tablespoon of UNSCENTED Epsom salts in a gallon of water. Add a drop or two of liquid soap as a surfactant.

 

[Smokeman710]

Why cal/mag with tap water? Too much will cause lockout.. Looks like mag has locked out calcium..

I definitely need supplemental cal mag pushing the plants this hard.

 

[Smokeman710]

Is t
Is there a chance the pH of your soil is off or maybe salts have built up in your soil? I've had that look before when my soil was a bit too hot and the pH had drifted.

Maybe turn your lights down till you figure it out, it will slow the progression.

I am dumb and forgot to mention that I’m growing in coco! That’s a major factor lol. I run a drain to waste system and feed 4 times a day right now. I don’t think it’s a ph issue because my reservoirs are steady at 5.8-6.0

 

[Smokeman710]

Is t
Is there a chance the pH of your soil is off or maybe salts have built up in your soil? I've had that look before when my soil was a bit too hot and the pH had drifted.

Maybe turn your lights down till you figure it out, it will slow the progression.

I definitely will turn the lights down. That’s a great point. Sucks that I’m gonna lose a few days during stretch running 100% but I definitely want to make sure it’s just a cal mag issue before I cause any more damage. Great advice!