I have been debating on how to handle a situation so i figured i would ask for some unbiased opinions. I recently bought a fish from a well know saltwater store here in denver. I have been going to this place for a while and have always had good experiences. I was there a couple weeks ago and they had some yellow tangs in the quarantine tanks and i asked if they were available for sale. The employee said they had only been in quarantine for a week but they were fine to sell. I decided to grab one and threw him in my tank. 5 days later all of my other fish had spots, lost color and eventually died (took about 1.5 weeks for all to die). I tried varied food (they still ate well), garlic, vitamins and started prepping a treatment tank but they died too fast. The only fish left living is the stupid tang that likely infected the tank. I had nice fish: twin spot wrasse, emperor angel, anthias and a mandarin. I take full responsibility for not having a quarantine system of my own and he did say they were only there for a week. I am bummed about the money ($200 worth of fish) but im more upset that i brought something in that killed all my fish, i like my fish and to watch them all slowly die sucks. My gut says go to the store and tell them about it but there's also a certain level of buyer beware with livestock. I know they do not intend for this to happen but its frustrating. Just curious what you would do in my shoes?