What is this on my acan?

[FishRForMe]

This started growing on the side of my acan frag and on one other frag? what is it?

 

[Dr_Steve]

It's Bubble Algae. It's a nuisance algae

 

[David Costello]

Bubble algae. Flick it off out of the tank. Don't pop it in the tank. Just MHO.

 

[cincyreef]

Bubble algae. Flick it off out of the tank. Don't pop it in the tank. Just MHO.

+1 on not popping it in the tank.

 

[FishRForMe]

Here's a good video on removing it!

 

[WVReefJunkie]

Remove, do not want to release spores in the aquarium.

 

[Second Shot]

Bubble algae is nasty stuff. You may want to think of putting the acan on a fresh plug.

 

[FishRForMe]

Yes, that's exactly what I did...