What's this??

[petcellar]

I've been doing ok on the algae front for a long time.... struggled with valonia for a bit but have some pithos and they are keeping it in check.

This is a new one though.... I tried to get some good pictures. The bubbles make me worried about dinos, but it isn't all over the gravel and such. It's very thick and relatively slow growing on the rockscape.... but thick/bubble and CUC not interested.

 

[Subsea]

Is it soft, mushy, spongy, brittle?

Is it easy to pull off?

Have you tried siphoning it off?

How long has this tank been set up?

What are your N & P concentrations?