I left for 2 days and when I returned I found my male ram swimming along the top front of the glass (very unusual for him and I knew my water parameters were good because I had done my regular water change before I left and checked it). So as I was watching him and he turned to go the other way and there was a large gash with some skin hanging off. I immediatly added some Melafix, but it was too late. I found him dead in the front corner of the tank on the gravel 4 hrs later with the female just hovering above him. She died a week later (4 days ago) of loneliness. She swam around in that corner looking for him until she died.