How do you know if/when it's time to remove an aggressive male? I'm not having any problems yet, but my fish are still juveniles, and I don't know my exact m:f ratios, so I'm worried that I'm eventually going to have problems. On the one hand, I don't want to wait until fish start getting sick and dying due to harassment. On the other hand, a little bit of chasing is tolerable. The question is how much is too much? How do I draw the line between acceptable aggression and dangerous aggression?