Worst thing that ever happened in your tank?

  • I’d have to say when I adding in a pretty badly attacked black knife eel as a friend was tearing down their tank, only to notice a day or two later that it completely killed all of my other community fish in the tank (not sure if it was an attack feast, or if it was super hungry, or what). Kinda sucked the most as doing a favor tended to make me restart my whole tank.

  • Probably the worst thing for me was a heater malfunctioning and basically shocking or overheating my fish while I was sleeping.


    Definitely not a fun time getting them all out while also getting shocked slightly until I found the piece of equipment that caused it.



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  • I went on a vacation. When I came back after 2 weeks, all of my goldfish died. I had a dozen goldfish. When I was on a vacation, there was a power outage for 24 hours which led to disturbances in the ecosystem of the tank.

  • When I was a kid, we had a huge tank. One morning I woke up & there was water on the floor. The tank had a small crack, still don't know what happened to this day. We lost most of our fish. The upside was we were going on vacation that morning so my dad was home to help clean it up.

  • So many early mistakes come to mind, not really sure. A lot of my fish died when I was a beginner.

    Mine was when s lot of fishes died as a result of polluted water. I felt it for days and couldn't even focus on eating for a while.

    So many early mistakes come to mind, not really sure. A lot of my fish died when I was a beginner.

  • A bacteria infection called Aeromonasinfection was what hit my fishes one time in the past. I kept treating it and it kept on coming back. It killed at least 3 of my fishes before I was able to fix it.

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