man, every time i get a feather duster they throw there crown within 2 weeks of being in the tank.this makes three now that have done this. i was thinking that it must either by bad placement or the stress of getting them to stay in the right spot. the first 2 lived but this third one im not so sure of. hes hanging out of his tube and letting me touch him with the scraper and not trying to get away. he just threw it today so maybe hes just slow. the lights were also off so maybe that has something to do with it. this really blows. :x