Sam, given that most people post successes and keep quite about failures, I'm not sure we can use that as accurate. Most people I've talked to in the last 2 years that bought an anemone (regardless of species), reported that it died "for some reason". Now most people I see buying them don't have adequate lighting, don't have skimmers, think NO3 less than 50 is good and have only had the tank months. Now maybe I have no clue what I'm talking about, but my belief is the general concensus is that they are very hard to keep. You're an anomaly...you keep lots of hard to keep things just fine
Maybe we should design a poll to get more info on this. We haven't had apoll lately.
3dawgs, I'm not sure if one dying anemone can affect the others. I'm sure the water quality was affected, so it's possible.