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What killed my fish?
I have an established 30-gallon freshwater tank at home... it's been up and running fine for 5 years now.
About 10 days ago I added 4 platies to the tank. The next day one died, but everyone else seemed fine.
Yesterday one of my older fish died, but everyone else seemed fine.
Then, last night, every single fish in my tank died! This includes the 3 remaining new fish plus the 2 remaining old fish.
There were no signs of anything wrong with any of them yesterday, and today they are all dead. The temperature is right, aeration and filtration are good.
All of the dead fish were covered in white fuzz this morning, but I don't know if that has anything to do with it or if that's just natural decomposition. There was nothing on any of the fish yesterday.
Anyone have any ideas what could kill so many fish so quickly without any symptoms beforehand?
Comments
My guess is that one or all of your new fish were extremely sick.
Posted by: bahua | May 13, 2008 12:08 PM
Sounds like one or more of the new fish was infected with columnaris, a common bacterial infection that spreads and kills quickly.
Posted by: Average Jane | May 13, 2008 12:45 PM