Help ID this "algae"???

[Hugo’s_Reef]

I finally beat (for the most part) my hair algae problem .the only thing left is the brown gooey stuff on my rocks.anyone familiar with this ?? all my water parameters are fine and phosphate are undetectable (hanna checker) this is the only thing im having trouble getting rid of .

[video]https://youtu.be/IKDT5fKxqG8[/video]

 

[Reefing Madness]

Doesn't look like algae to me, but some bacterial growth of some sort.

 

[Hugo’s_Reef]

Doesn't look like algae to me, but some bacterial growth of some sort.

I'm trying to look up information on bacterial growth, but can't really find much . Any idea on how to get rid of it ???

 

[Reefing Madness]

I'd brush it off and siphon it out.