Is this algae of some kind or something else?

[Lauje]

I have no idea what this is. It’s growing on my Frag rack.

 

[EnterName]

My guess: "Blue Clove Polyps"
Invasive and unwanted

 

[Lauje]

My guess: "Blue Clove Polyps"
Invasive and unwanted

Thank you! Never thought of that.

 

[Tahoe61]

Well dang. Clove Polyps.
I would definitely pull that frag rack for a through cleaning.
Unfortunately you really have to stay on top of the removal of them.