HELP! Unidentified leaves problem.

[JCD]

Hi all, I have a problem with leaves on young plant. I can't find any information about the symptom. Anybody can assist in finding what is wrong?
Medium is Coco, food is General Hydro (Flora series) with Cal-Mag, in a tent with LEDs canopy, seeds is Bubba Kush. I have used this equipment for few years and didn't had any problems.

There are no bugs or powder, just this strange spots. This has been noticed about a week ago.

Please advise if you know what is going on.

Thanks!

JC
Symptome:







Added pics

[DW2]

Howdy JCD, I cannot see enough detail in the photos that you posted, can you post a couple of higher resolution images, including the underside of the leaves? It kind of looks like leaf miners, but I can't tell for certain. Also, is it on all of the leaves, or on just a few of them?

[JCD]

Thank you for helping! The problem is only on top of leaves, underneath affected leaves is all OK. See added pics.

[KLAX]

Have you checked the Plant Problems page (https://www.growweedeasy.com/cannabi...oms-pictures)? I suggest always checking there first. Honestly, it's the best problems page I personally have found anywhere. It's the reason I joined the forum.

[JCD]

Thank you for the link. I went there first before posting here. None of the pics shown corresponds to the problem I have.

[OldManGrower]

I think it is a PH issue but to be honest, that's what I usually see.

[JCD]

Ph is 6.0: I use distilled water with the nutrient schedule. I tested the Ph and it is 6.0.

[Rwise]

You have bugs.

https://www.growweedeasy.com/cannabis-plant-problems/how-to-get-rid-of-spider-mites

https://www.growweedeasy.com/cannabis-plant-problems/thrips

https://www.growweedeasy.com/cannabis-plant-problems/leaf-miners

[JCD]

Thank you for the links. I inspected the leaves with a strong magnifier and there are no bugs to be seem. The damage is only on top surface of the leaves.