My feather duster crawled out of his little leather sack last night.. i sthis normal? He is still alive and has actually moved around the tank... Any help is appreciated.
He'll probably eject the crown as well. If he does - dont let it worry you at all.
Hows all your water levels checking out? Usually they move because they're not happy with something, it would be a good idea to check everything and correct anything thats not good.