The last tank that I set up was fishless for 6 months, and I impatiently waited a year before adding my Powder Blue Tang. Panda, if I were you, I'd look for a different LFS. One that will tutor you and help you. Not one that will just sell you anything. Like stated before, a quarantine tank is a necessity in this hobby. Also, there's several real good books out there about starting a saltwater aquarium and several good web sites with videos. If you really want a saltwater tank then you are going to have to become a blooming biologist and study, study, and study some more. I wish you the best of luck. Right after I said, "I haven't had a fish die in years." I bought a Copperband Butterflyfish that didn't make it out of quarantine. Sometimes it's not your fault. Also, I've been in several LFS that it looks like the fish have been dipped in powdered sugar. I'll just say to my wife, "I won't buy anything in here." and walk out. Butterflyfish, tangs, and angels are more prone to disease than other fish and you should wait until you are more experienced and have an established tank to buy them.