So far I have had two bettas pass and in both cases knew it was coming. With Rude he was ALWAYS ill and didnt seem to have an immune system and with my other Tiny Tim well he had passed the one and a half year mark and developed the grey beard, he went pretty peacefully. I was very attached to them as all my bettas but Calcifer was the first that started the madness and is such a little diva, very special to me and Alex x