Eggs in Chaeto?

[TomSerious]

Hello!

I just bought some Chaeto from my LFS.
Now I found 2 and some smaller see through things? (apart from a lot of other stuff that I could identify )
They sound very hard when dropped into the sink and they have one tiny hole in them.

Could they be egg shells of some sort?

Does anyone know what that is?

TIA!

 

[Crabs McJones]

Looks like bubble algae

 

[Wolf89]

Bubble algae. Take as many as you can out without popping. They are a severely invasive pest.

 

[TomSerious]

Thanks thats right!