Marco Schwarz wrote:

In the 70s some of my feather dusters from the Mediterranean Sea were
able to (re)build their tubes using mud, clay-fine sediments and sand
but it seemed to be stressfull to them..

Well, the cluster of feathers keeps appearing and disappearing. I squeezed the
old tube as Tristan suggested, and it seemed to be empty, so I tossed it. I'd
like to get him out of that cave, but I can't easily reach him. I'd bet that
he's so curled around live rock that I couldn't get him out anyway.

George Patterson
Forgive your enemies. But always remember who they are.