Spotting on leaves not too sure what caused this, advice?

[Pennywise]

Check for those bugs, I promise you they are there.

 

[Jackalope]

It looks more like bugs than anything else. I have not had to deal with bugs as of yet so I can't say for sure. I have had tons of other problems and nothing looked like what you have. That is another reason to look at bugs.

I am a soil guy so things are a lot different. My soil has the basic N-P-K nuits that hydro guys run. Any time I have problems with leaves. I use Lilly Miller B-1 plant starter for Cal/Mag and other things in the solution. That usually solves the problem. I don't know what hydro growers use to add cal/mag. You said the leaf problems are in the middle of the plant on older leaves. That usually means cal/mag problems in my grows.

 

[Bush Doctor 77]

I see black bug shit on "Underside" I think. The bugs are gonna be 1/10 the size of the damage spots. I'd swear that is bug damage. Give neem/dish soap a try. Don't spray with bright light or fans on, and get the bottoms.

 

[leblanca]

It does seems to be slowly spreading, i give a soap and water spray tonight and hope it resolves it.

 

[Marzbadrock]

My bet still on thrips

 

[leblanca]

My bet still on thrips

Its possible but i took some shot under a microscope on a leave a took off and it doesnt look like mechanical damage.
Maybe fungus or im starting to think they have clacium deficency, i read that it get absborb at 6.2ph and im at 5.5ph.

Back side

Front side

 

[Pennywise]

If your in soiless then 5.5 is very low. Most of us run 5.8-6.2 ph in coco.

 

[leblanca]

If your in soiless then 5.5 is very low. Most of us run 5.8-6.2 ph in coco.

Yeah i increased it from 5.5 to 6.2, i see if it stop spreading.

 

[Pennywise]

If it’s a ph issue that should fix it, remember that coco binds calcium until it can’t hold anymore. When you hydrate coco use a strong calmag solution so the calcium you add later goes to the plant and not getting trapped in the medium.

 

[leblanca]

If it’s a ph issue that should fix it, remember that coco binds calcium until it can’t hold anymore. When you hydrate coco use a strong calmag solution so the calcium you add later goes to the plant and not getting trapped in the medium.

Ok, well i dont really have a medium, there is a small 1in rockwool cube where the seed started and some clay pellets to hold it in place.

 

[Pennywise]

Ok so calcium binding isn’t the issue. That’s good then.

 

[Bush Doctor 77]

Bugs or mold, spray with neem/dish soap.