Unknown blue covering

[ruscar]

This is on the rock that my Xenia frag was on, before it walked away. The first pic is about 8 mo. ago, the 2nd today. The total size is about 1 in. dia.. Yes it it really that blue. I appears to only grow on the "white" stuff. Any idea? Thanks, Russell
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[coolsurf]

It's bad to have in your tank so I should take it and study it so it does not come back!!!

 

[merkywater]

Looks like some sort of sponge to me.

 

[coolsurf]

merkywater;540859 wrote: Looks like some sort of sponge to me.

+1 to the sponge. Really not bad if it is...sign of a healthy tank.

 

[jennm]

Pretty sponge We often see the yellow variety. Very nice!

Jenn

 

[ruscar]

Could be? But if you look very close, it is comprised of small circles (3/16) with a very small white center (note the white specks). Thanks for your thoughts.

 

[smoothie]

ruscar;541007 wrote: Could be? But if you look very close, it is comprised of small circles (3/16) with a very small white center (note the white specks). Thanks for your thoughts.

Yep sponge. Daddy likey if you want to get rid of it
You should keep it though. Very colorful harmless free filtration

 

[skriz]

Sponge for sure

 

[jead85]

I have yellow sponges, but not blue. Can i have your blue?

 

[bdesper311]

Nice sponge, your lucky!!!

 

[gnashty]

skriz;541096 wrote: sponge for sure

+1

 

[delpni]

I have a light blue sponge VERY similar to that, which I had to purchase...I'm jealous! I aggree with the people who say it's a sponge. :thumbs: