Im getting this on my autopot system… 1 week into flowering?
Using the General 3 part series -
I don’t see anything alarming. How about pics of the whole plant?
Have any whole plant pics? And a couple bud shots? Almost looks like leaves may be hitting each other. Kinda hard to tell with just a couple individual leaves.
Agree with @Borderryan22 , looks like mechanical damage not chemical.
Do you have a fan blowing directly on them?