i have an aggressive tank and looking for info on other aggressors i can mix with them?
any ideas...... dovii 9 to 10 inches and a butter koifry 14 inches
+1. The Dovii will need something bigger just for itself. That could be a major reason why you are having aggression issues. Nuttall has a similar stock as yours and he is having the same problem. I wouldn't suggest adding anything else until you get a much larger tank.