Today I went to do a pwc and one of my cory cats was dead and stuck to the filter. About 20 minutes after removing the dead cory cat and doing the pwc, I went back to the tank. One of my other corys was having trouble swimming. He was floating all around the tank and trying to swim, but all he was really doing was flipping in circles. I turned off the filter for a few minutes just so the current wouldn't keep pushing him around.
I don't see any physical signs, no open sores or anything. The water is 0 ammonia, 0 nitrites, about 20 nitrates. Any ideas about the cause and treatment options?
I don't see any physical signs, no open sores or anything. The water is 0 ammonia, 0 nitrites, about 20 nitrates. Any ideas about the cause and treatment options?