Sale tanks at LFS are NOT setup for long term maintenance. The rams crowded in a tank are not getting along, they are just too stressed to do anything about it. Since the goal of a home tank is to keep the fish alive in the long run, researching and making certain you can accomodate the 'normal' status of the fish is crucial. 3 rams is asking for trouble in most tanks--they do best kept as a pair or solo.