I currently have a 55 planted with a pair of 6" Geophagus Surinamensis, Geo's, and about a 4-5" marbled angel, and a 7"Green Phantom pleco. I was wondering what could be some good additions to this tank, that wouldn't require the most challenging care, as I would only be able to reach it on weekends since it is at my house, and I am at a dorm now, so my parents are taking care of the tanks. I was looking for more of some smaller schooling fish to take up more space and just leave the angel and the geo's as the main attraction. Maybe a couple hatchet fish for the top and some sort of tetras for the middle? I am not sure the sex of the Geo's, so I am not sure if they really are a pair, but they get along very well with each other, I am not sure if that would say anything about aggression or not for suitable tank mates.