Is this infection?

[bushizell]

I recently split off half of a batch of Oatmeal Stout in order to Oak age half. Two days after siphoning off, the original batch started developing strange formations in the beer. Any idea what it could be?

 

[bushizell]

I recently split off half of a batch of Oatmeal Stout in order to Oak age half. Two days after siphoning off, the original batch started developing strange formations in the beer. Any idea what it could be? View attachment 594408

This is a photo I took right after splitting off. Nothing was floating at all at the time

 

[tgolanos]

The first pic just looks like hops debris floating around. Probably got disturbed when you racked the beer onto the oak. Nothing I'd be concerned about.

Some of that fermenter head-space might give you some problems if primary fermentation is over, though.