About 4-5 years ago me and my brothers tried to set up a saltwater tank.
After a diving trip and catching some reef fish like tangs and puffers, we threw them into a 55 gallon. The salt levels were out of whack, and the tank had been set up not an hour ago.
With the fish in the tank, we kept adding salt until it reached 1.025. Some days later, I bought and added a mandarin dragonet
Needless to say all inhabitants died shortly after.