Some time back I bought 2 Bolivian Rams. Within a couple of days one of them started going black and after another 3/4 days died. The remaining one is fine, and I have had now for a year. I would love to have more of them as they are wonderful fish to watch. I understand that they can be quite territorial, and noticed when I had the two of them each would keep to their own side of the tank, and would swim up to the centre of the tank and then back again. they would never be in the same part of the tank together. i assume that the one that died probably died of stress. Has anyone any suggestions for how I may keep more of them. I have a 180 litre tank.
They're best kept in groups of 6-8. The problem previously was likely that you had two males - in a larger group any aggression is spread rather than directed at just one fish, plus they have females to distract them too.