Well said SeanF. Ich is not and does not have to be present in every system. A simple QT tank can be set up and can be one of the most important elements to keeping a marine tank. As a retailer we try(or at least should) to keep any parasite, disease, infection out of our tanks and our customers tanks. But at the same time we try to keep the cost of our livestock down, so treating every fish/coral untill it is free of any said pest can be costly. So further QTing should be done by the consumer. I try to stress the importance of a QT tank to all my customers, but most of them think they dont need one unless a problem arises. And when one does they want a cure for their reef tank. I have never used a "reef safe" treatment for ich that has actually worked. Until we can convince everyone that owns a fish tank that a seperat QT tank is as important as any other piece of equipment, we will have these discussions.