Yes, George, I have occasionally had aggressivity problems with my rams, but I'm working on coming up with a good strategery for dealing with it. ;P Anyway, do you mean you are having problems between the partners in the pairs, or fighting between the pairs. I generally only experience the former when a pair is in too cramped a tank, like a 10. Perhaps the change in environment upset the relationship. If the latter, that has been normal in my experience. I had two pairs of rams in a 90(same footprint as a 75), and they immediately claimed an end and defended it against the other pair. It usually didn't result in any major damage, but there were occasional ripped fins and such. The other tankmates never seemed to affect this relationship between pairs, but I think it actually helped to have the other pair in there to provide an enemy/competition. They would spawn every seven days, in sync with each other. Zack ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.