Yikes. Didn't mean to get everybody all jazzed up. The only thing that I was stating as fact was about the bacteria, not that a UV steralizer was necessary. I've said from the beginning that everyone has an opinion, and a choice. Mine is to use a UV steralizer. For me it works great, everything is huge and healthy. My only point is that peole should not make statements like "you should never use a UV steralizer in a reef tank" because for many people, they work great. If you don't like them, state your reason and let people make their own decisions. Don't make your opinion sound like the results of a randomized, double-blind, multi-center trial. If you do have facts, reliable facts, state a source. In my profession, the trial and error method gets people killed and other people sued, so I must rely on facts. So to sum it up, in my opinion, UV steralizers aren't necessary, nor are they lethal, but for me and my three very healthy reef tanks, they work great.