Slimy spot on rock.

Hitachi · Sep 29, 2020

I found a spot on a rock today that is slimy and under better lighting looks purple. Can anyone I’d it?

fishguy242 · Sep 30, 2020

hi,hard to tell,looks like black sponge

Hitachi · Sep 30, 2020

I hope so, that would be cool.
Thank you.

SHNICI · Sep 30, 2020

Hitachi said:
I hope so, that would be cool.
Thank you.

Have on mind most of them are invasive (the black sponges) too are destructive to the LR and the creatures inside. Also if something disturb it on place (fish, invertebrate) it can nuke the tank with poison, after all can start smell like rotten eggs.