I bought some frags from another WAMAS member a while back. I asked if he had any problems in his tank and he assured me that he didn't have any issues. I brought up his build thread and the mention of flatworms and was assured they were gone and had been gone for a long time, so I took him at his word. MISTAKE #1. Being lazy, and a bit stupid, I put the frags right in my tank........I mean, I didn't see any pests and all the corals looked good, so why not? MISTAKE #2. Low and behold, there are a kajillion flatworms in my tank (I didn't think kajillion was a real number, but if you ask anyone who has seen my tank, they'll tell you it's an accurate description). I syphon out millions of them every week and they just keep coming back. Oh well, they aren't hurting my corals so no biggie, I'll just bomb the tank to get rid of them. Wait, flatworms release toxins when they die? Those toxins can kill my fish and corals? So now I have to take all of the corals out of my 210g tank and have to basically start from scratch. I have to dip every colony and put it in a tiny temp tank and hope they survive. I have to bomb my display repeatedly and hope I can get rid of them. And then put everything back in my tank hoping that I got them all and don't have to go through this again.
So to all of you newbies and those that think dipping is a waste of time or that it can't happen to you, take a lesson from me. I'm really seeing the dollar signs pile up. I'm taking the blame for this because of my stupidity for not dipping, but make sure you ask the questions when buying frags from others and DIP YOUR CORALS!!