Lost my new lion fish this past week when the heater cracked - eel made it fine. Urchin lost some of its spines, snail and serpent star seem to be fine.  I bought a new heater, but instead decided to put a penguin filter on the back instead of the millenium - it has the heater as part of the filter, so no chance in that thing cracking even if the filter runs dry.  Hopefully everyone will make it!  Didn't even get to get any pics of the new lion before he passed.