When my wife and I decided to get back in the hobby last summer, we promised ourselves that any fish that was introduced to our system would go through a 4 week quarantine period. When we were in the hobby ten years earlier, we weren't as patient and paid the price in lost fish. We stuck to our guns and every fish has been quarantined. The Regal Tang was actually given a prophylactic treatment of Cupramarine and Prazipro because I know that they can be subject to getting ich easily. The Regal Tang was moved to the display tank on November 20th and has been doing great. He eats heartily and gets along with tankmates. He even pals around with my two Percs. It's like watching "Finding Nemo" live. Two days ago I noticed a white spot on his body just in front of his tail. My first thought was ich but maybe it could have been fungus. This morning as the blue leds were ramping up, it was easy to see the powdered sugar look to him. I know what has to be done but I also know that I'm probably going to have to dismantle at least part of the reef just to catch him, and if I'm going to do that, I should catch all of them and leave the tank fallow for 6 weeks. It just goes to show that even when you try to do things correctly, this hobby can still jump up and bite you.