Has anyone else noticed an increase in aggression among Trophs. as the tank temps increase during summer months. My tank temps have all recently gone up several degrees to about 83-84F, and all Troph. colonies(5 different) have become quite aggressive. I hate to pull isolated beat up fish, but I have had to in all the tanks, as they haven't got a hope of surviving. The breeding activity has also increased but I'd sure wish the hostility would take a rest.