Rust colored spots

[dwalkama]

What do you guys think this is? It occurs on the fan leaves of a couple stalks. Is it a fungi?

 

[tclowson44]

I have been reading a lot due to having the same issue and it has came down to four things cal/mag deficiency or bad ventilation either a abundance coming in and not enough going out, to high of humidity, or try flushing and only using half strength of mutes after flush. Hope this helps buddy

 

[dwalkama]

I have been reading a lot due to having the same issue and it has came down to four things cal/mag deficiency or bad ventilation either a abundance coming in and not enough going out, to high of humidity, or try flushing and only using half strength of mutes after flush. Hope this helps buddy

This happened on my last grow too, but it didn't affect much so I'm not gonna worry unless it spreads

 

[Imhigh85]

The Cal Mag should fix your problem