I have recently decided to upgrade to a larger tank. Previously I did not QT fish and have of course learned the error of my ways. I am now very set on the idea of a parasite free tank.

Unfortunately I am a very paranoid person and have therefore thought of every possible random almost impossible way of infecting my tank. I have read many opinions that say all anemone fish should be treated with a formalin dip for Brooklynella.

I've had my pair of clowns for some time now. They are currently in a small 12g as they had to be removed from my main tank after they broke out with what I believe was ich. At the time I treated them with Instant Ocean Lifeguard. It seemed to have worked and they are health and happy. However, as I previously mentioned I am paranoid and therefore still plan on copper treating them before placing them into the new system. This however still does not address the possibility of Brooklynella. I don't want to treat for it if they haven't shown signs of it. But many websites suggest a formalin dip as a necessary practice for QT of anemonefish.

I won't be setting up my new tank right away so I have some time to figure out a plan of action. I was really just hoping that someone who feels they have sucessful QT procedures could tell me if they formalin dip any and all anemonefish? Also, since I have had mine for some time with no signs of a health issue does it seem necessary to treat them for it? I couldn't find that much information on the disease so I don't really know if it can be on a fish and be undectable like ich. That's my fear I guess.