Aquageek,, While it was not a "crash" of my chaeto I did develop a bacteria in my sump while I was on vacation in Puerto Rico. Things were out of whack while I was away since I feed less while away but yet GFO was still on etc. 75% of the chaeto went soft and started to disintegrate. So I pulled all that was even a little soft and growing it healthy again now but for now I dont have enough to spare. I will likely have enough for the summer charity swap in June but I dont have any now to give away