Hi, I just have a quick general question about oticinculus (sp?) catfish. How high are they on the social-ness bar? I didn't know if they're very social fish like kuhli loaches, for example, and will be unhappy if kept alone, or if they could be kept just one to a tank and be quite comfortable, like plecostomuses. In other words, if the only factor considered is the social happiness of the oto's, how many should be kept in a tank at minimum?