Planted Tank Enthusiast
Join Date: Mar 2012
Location: Hobokenish, New Jersey
the death roll
So I purchased some pygmy cories last week. Everyone seemed fine. Then a few days later I noticed one of them doing what i call the death roll. It's when the spin in circles whlle swimming forward. Most fish dont make it after that. I chalked it up to being the drive from the pet store or he wasn't as healthy as he looked. No big deal. Then the next day another pygmy was doing the death roll. I flushed him before he died in the tank. Then 2 days later one of my otos turns up dead for no apparent reason. At this point I'm suspicious and plan to do a water change the next day. I didn't have time then.
Then yesterday (planned day of water change) 2 more pygmys doing the death roll. I left these 2 and did a 20% water change and I think I saw 1 rolling this morning before I left for.work. I plan on checking params after work. Is there anything I missed?