Let me tell you a story...I set up my beautiful tank and listened to the advice of the staff at my local fish store (lfs). He told me that there is ich everywhere and quarantining isn't worth it. So I listened because I was newish to the hobby, I didn't do my own research, (which everyone should do) and I now have ich in my very expensive tank. I keep it at bay with regular water changes, good nutrition, a UV sterilizer, and everyone is healthy. But the ich is always there. It never leaves. Every time I add a new fish, he develops ich. I currently quarantine my fish, but I can't do it the recommended way. I only use copper if I think there is any chance that my new fish have velvet, etc. Otherwise I quarantine and try to get the flukes and internal parasites out of them, then I put them in my ich-filled aquarium after a few weeks of supervision. I always hope they are healthy enough to battle off the ich. Right now I have two tangs that are about ready to go in my display tank. They are beautiful and healthy, but tangs and ich are synonymous. My purple tang in my display tank is healthy and fights it off no problem and I never see a speck of white on him, but I'm terrified of adding my new fish. I may have gone through weeks of quarantine for nothing if they can't fight off the ich when they first move in. What I'm trying to say, is if you have a chance to go fallow right now with a new set up, do so. You do not want to be me with a huge tank full of fish and have this problem.