What is this?

[Msme]

 

[jsker]

Look like a start of a sponge.

 

[cloak]

The one on the right looks like a harmless Pineapple sponge. The red thing on the left looks like either Cyanobacteria or perhaps red bubble algae

 

[Msme]

The one on the right looks like a harmless Pineapple Sponge. The red thing on the left looks like Bubble algae. (bad)

Thanks!☺

 

[Msme]

How do you get rid of the bubble algae?

 

[Msme]

How do you get rid of the bubble algae?

 

[Chefbill]

pick it out without popping. Or emerald crab will eat.

 

[MaiReef]

Definitely pick it out. Emerald crabs don't always eat it.