Is there a fungus among us?

[SubmarineGirl]

Noticed this rusty leaf on one of my clones and was wondering could it be a fungus? These clones are under a plant light in my MBR so they are not exposed to high humidity. I’ve been adding veg nutes with each watering ph between 6.3 and 6.5. The clones are only a few weeks old. The other plants do not have this problem but I don’t want it to spread to them. this area is easier to see under the colored lights. I have also added cal mag with each watering

 

[ROSTERMAN]

Does not look like a fungus to me.

 

[ROSTERMAN]

Is your PH on point 6.5 - 6.8 for soil?

 

[SubmarineGirl]

Is your PH on point 6.5 - 6.8 for soil?

I have a ph meter that you stick in the dirt that reads 6.5 but I’ve not measured any run off. I usually don’t water enough to get measurable run off.

 

[WeedHopper]

Please don't take this wrong but those PH meters that you stick in the ground are very unreliable and not very accurate.

 

[ROSTERMAN]

I have a ph meter that you stick in the dirt that reads 6.5 but I’ve not measured any run off. I usually don’t water enough to get measurable run off.

Those meter are not very accurate , PH may be off.
Amazon sells cheap ph meters to start with and you can go more expensive if you really get into it.
I used cheap ones at 1st and then more up to a Blue Lab version Pricey....

 

[ROSTERMAN]

https://www.amazon.com/Hydroponics-...jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

 

[ROSTERMAN]

Subgal Click the above Amazon link

 

[SubmarineGirl]

Please don't take this wrong but those PH meters that you stick in the ground are very unreliable and not very accurate.

I’m sure. I got it for Christmas. Also has a light meter and water meter. I’ve used it for the water meter only to compare each plant for dryness but the soil must be perfectly wet to even get a PH reading at all. I will over water a bit to get a more appropriate runoff reading next time I feed them

 

[ROSTERMAN]

I’m sure. I got it for Christmas. Also has a light meter and water meter. I’ve used it for the water meter only to compare each plant for dryness but the soil must be perfectly wet to even get a PH reading at all. I will over water a bit to get a more appropriate runoff reading next time I feed them

Show us your meter
I spent 60 dollars on one like that and it still was crap

 

[SubmarineGirl]

Subgal Click the above Amazon link

Yes I have one of these. I use it to check everything going into the plants. Just haven’t used it yet to see what’s coming out cause I’ve never watered enough to get measurable runoff. But I will next time I water

 

[SubmarineGirl]

Show us your meter
I spent 60 dollars on one like that and it still was crap

 

[Bubba]

Hard to tell from pic, could that be where water drops got left on leaf?

Bubba

 

[ROSTERMAN]

Yes I have one of these. I use it to check everything going into the plants. Just haven’t used it yet to see what’s coming out cause I’ve never watered enough to get measurable runoff. But I will next time I water

If in soil you really should do a slurry test of the soil
The runoff will not give a true reading
test is easy
https://www.thcfarmer.com/threads/soil-ph-slurry-test-step-by-step-with-photos.102721/

 

[ROSTERMAN]

Hard to tell from pic, could that be where water drops got left on leaf?

Bubba

I thought that at 1st but looks to be spreading in the affected leaves

 

[ROSTERMAN]

View attachment 285551

As we said that meter is not very accurate
Calibrate the yellow pen one before you use it again and try the slurry test
See what numbers come back as, it will rule out PH problems
Could be something else too.
Hard to say at this point,

 

[SubmarineGirl]

If in soil you really should do a slurry test of the soil
The runoff will not give a true reading
test is easy
https://www.thcfarmer.com/threads/soil-ph-slurry-test-step-by-step-with-photos.102721/

Ok I’ll try this. I didn’t know about the slurry test

 

[SubmarineGirl]

As we said that meter is not very accurate
Calibrate the yellow pen one before you use it again and try the slurry test
See what numbers come back as, it will rule out PH problems
Could be something else too.
Hard to say at this point,

How often do you recalibrate your pen?

 

[ROSTERMAN]

Ok I’ll try this. I didn’t know about the slurry test

That is why we are here to help you, most people do not do this.

 

[ROSTERMAN]

How often do you recalibrate your pen?

If I am in an active grow I store the pen soaking in a solution to keep it wet (probes)
If stored the cap will hold a lil solution stored in upright position and should be re wet when it starts to dry. dry probes will ruin the meter