Taken from another thread and reposted here with permission from the author:
Oh a very sad note, I went to my local ***** last night from some non fish stuff (chinchilla/kitty stuff just incase you wondered ) and they have about 20 tanks with salt water and everything was dead! all the poor little clowns, tangs, everything! The guy working there was trying to fix things and said that someone left the freshwater on and freshwater poured into the system and killed everything the SG was none! It almost made me cry a poor little niger was just holding on for dear life. The guy also said "last time this happened I added it up and it was about $800 worth of fish" and all I could think was last time! You mean this has happened more the once!? Poor babies.
DaneDodger- Sure you can copy and paste what I said. It really was very heartbreaking! I almost felt like saying "give me the fish!" So I could take them to my friend's tank and try and save the ones that were holding on. One part that bothered me the most that I didn't mention before was that this girl came over to the guy that I was speaking with (the one that worked there) and she worked there as well... well the guy said something to her about her leaving the fresh water on and she was like no it wasn't me it was so-and-so, laughing about it. It was like all these fish have died because someone was lazy and they just thought it was funny. I seemed to me that ***** should leave such things to more experienced, caring people and not just the kid that runs the register. I am sure it would save ***** a lot of $ in the end. It also really bugged me that the female employee was cursing around a young child and if I had been that mother I would have said something to her. But of course this poor kid is seeing all these dead fish and cursing, wow great job *****! In fact the male employee told me that it was a child that told them that the fish were dead, he said a little kid came over and said "all the fish are sleeping all at once" heart breaking, just heart breaking! Oh one other thing the guy said to me was "hey for all we know it could be some cool like drug trip for them!" Yeah I don't think dying is a cool drug trip.