Weird feather duster... Coming out from its tube.

Did you just get it? If so, it might be trying to find a flow pattern that it likes. Don't try putting it back in it's tube. If it is healthy, it will build a new one. At least that is what I've read and heard.
OK guys, it's all out since yesterday, and now it took off its crown... I think the fish like the crown, they biting it...

Should i leave it like this or throw it all to the garbage?
for my self when my feather droped its crown and left its tube it ended up as food for the crabs and nass the crown was removed before I could even find the worm. once I did it was being eaten