i have gotten two silver dats in my 125 gallon tank with a variety of cichlids and catfish. the aggression level in the tank only arises when the loiseli get in a bad mood (all the fish in the tank are under 5" except for 3 catfish). i was curious if the aggression would be at a high because i only have two silver dats. i picked the one up today and the other 2 weeks ago.