You'd think leaving a few fish at home while you go to college for a few months, they'd be okay, right? Well I found out the day after Thanksgiving that my Green Severums had died. They had actually died the weekend before but later found out they were fighting the night before and when they came down to feed them the next morning the tank water was a redish-brown color and both had died. They said the smell was the worst part of it, and that what we believe was the male, had a larger lump on his head than before. They were still healthy up til that day. We'd only had them about 8yrs and they were about 7yrs old when we got them. Anyone have any idea what could've caused them to do this?