[geekdafied]

A lot of the diseases and parasites getting around has a lot to do with people not realizing they have them, and then pass them off to other people. Those other people think they are getting healthy corals and then they get it, and so on and so fourth until somebody dips something and catches and then nobody has a clue where it came from.

Like Tangy said, dipping does not kill eggs, you have to quarantine all corals and fish, and dip them 2 more times while in a QT. Its better to be extremely cautious then it is to have your display infested. I no longer have a display as a result.