My cory just died. What was wrong with it?

[skatoholic]

One of my julii corys died last night. When i removed the fish from the tank, it looked normal except it was dead! I tested my water, and everything was fine, with an amonia with 0ppm. My pleco and the 2 other corys look to be healthy. Do fish just ever die for no reason? Please respond so that i can do a water change if something is wrong. Thanks.

P.S.
Now in my signature, I only have 2 corys

 

[Fatboy]

Hmmm. I guess you could attribute his death to natural causes. How long have u had him for? I wouldn't worry too much about it for now unless theres another fatality, then I would start worrying. Make sure that your nitrates are good.

 

[skatoholic]

I had him maybe a month or 2. I got it form pets mart, but it was healthy up until it died.