HELP! Help. Holes in plant :/

[atoms]

Hello amigos,

well here i am again with some issues. There is some holes in leaves appearing. Mostly on top leaves and new growth. I have looked carefully and cannot find any visible bugs/pest. I did order a jeweler loupe but wont be here for a few days. Until then im not too sure what to do.

5 Gallons smartpot in coir
Under vipar led 450w at apprx 36 inch. (18/6 cycle)
temp 23-26 C
Fertigation 2x daily.
Ph between 5.6-6.3 ish
Just started to measure PPM, slowly reaching 900ppm to get a higher ppm run-off.
I added a second fan in an attempt to deter bugs of hanging around the plant.

Plant is still small for a month in (about 6 inch) but it had a rough start with light burns early seedling and fertigation frequency ect, so i believe its just the results of the learning curve,

Any input appreciated.

1- Hole that got bigger, from a pin head to this size in about a week. You can also appreciate yellowish dent in the center of the leaf.
2- Under that same leaf
3- Holes
4- Holes (tear is my fault)
5- Main stem

[alltatup]

I'm not sure what kind, but you got some critters chomping away. Read this and see if it helps:

https://www.growweedeasy.com/bugs-pests-symptoms-marijuana-grow

[atoms]

I did but couldn't pin point exactly what it could be Except maybe a caterpillar? what else eat leaves directly?

[NebulaHaze]

Is it possible the leaves were damaged when they were young/small (for example during training or topping)? Sometimes a tiny injury on a small leaf will end up looking like a hole or crack when the leaf actually gets bigger and spreads out. You mentioned it was happening mostly on new growth, so I thought I'd ask because I've had that happen to me and initially thought it was a bug infestation!

[atoms]

I did top it 1 week ago, so it could be it. Could too much wind cause that?

[NAKEDGARDENER]

I believe this is what it is exactly, since I did the same and still have the leaves on the plant, also a split that happened in one leaf now it’s older looks like a tear, etc. if it’s not happening on anything else just those few it’s more likely it was damage done and as the leaf grew that hole and tear has ..

[atoms]

Thanks for your inputs!