I have to disagree, and say you don't always have to deal with disease with new fish. I have never received diseased fish from reputable sources. All my new fish are quarantined as a precaution, but I never worry about getting sick fish from people I know and trust. I always buy fish in groups anyway, a dozen of these, or 10 of those, and rarely mix groups from different sources. This further reduces any chance of disease outbreak. Even if I do mix fish, it's after many months of the fish being housed in my systems. I would also say, never trust reviews about a company that are on their own website. Get your reviews independently, because who knows if they made them up or not?