Any ideas what this might be?

go go kid · Oct 16, 2020

not 100% sure, but maybe a cal/mag deficancy

Star Dog · Oct 16, 2020

They look dark to me, have you tested the ec run off?

KK26 · Oct 16, 2020

It's a cannabis leaf

Jenko · Oct 16, 2020

I would say heat burn

Medskunk · Oct 16, 2020

...some overwatering also

mikeyboy2121 · Oct 16, 2020

Looks like burn of some sort. Nutes or light.

Jenko · Oct 16, 2020

mikeyboy2121 said:
Looks like burn of some sort. Nutes or light.

I would say light! How often do you feed them??

mikeyboy2121 · Oct 16, 2020

Jenko said:
I would say light! How often do you feed them??

I've had leaves look exactly like that when too close too soon to my led's.

Jenko · Oct 16, 2020

mikeyboy2121 said:
I've had leaves look exactly like that when too close too soon to my led's.

Exactly lol reason i know is cause i've done it myself.

wingerdinger · Oct 22, 2020

We figured out its a fungus,
Whats the best way to clean a sealed room from a fungus like this?

Freedom Club · Oct 22, 2020

wingerdinger said:
We figured out its a fungus,

I dont think so.

Remove all plants, clean the room with cleaning stuff like chlorine.
Personally I think a fungus is the least likely option by far

Renfro · Oct 22, 2020

wingerdinger said:
We figured out its a fungus,
Whats the best way to clean a sealed room from a fungus like this?

Rust fungus? Didn't look typical of rust fungus.

To clean I recommend Physan 20.

wingerdinger · Oct 22, 2020

How do i clean it out of my dehumidifier/aircon/ carbonfilter/fans?