I am sad to report that y "red-tail" silver aro that I got at the auction died last night. I am completely puzzled as to how it died though. I saw him swimming as he always had just a matter of 3-4 hours prior and he was taking pelletes no prob. Then I found him stuck to the filter with his stomach eaten away. Tank mates have always seemed harmless, so im lost. Had I not paid only 6 bucks I would be really mad.
But first off, you have to describe your regimen as well as the tank condition and specs and his tankmates. Maybe from there we can find out why he suddenly died.
What size are the tankmates and what is the water condition? Fish dont usually die for no apparent reason unless it got eaten, so ud better check whats wrong with the tank and rectify the problems before futher unfortunate events occur.