55g planted tank with 1 - 4.5 inch Oscar (he's grown almost an inch a month since we first got him when he was only 2 inches. As I've read he will grow at that rate until at least 7 inches before slowing down much at all - up to 12-14inches). He has no tankmates and thus far is very healthy. Will he be lonely in there all by himself as he grows or is a tankmate a good idea? We are still planning on getting an even bigger tank in the future, most likely for Oscar to have more swim space. I am slightly concerned with algae developing on the plants, would a pleco be a good tankmate for him if I do get one? Also what other fish would work with this setup if any? :help: Thank You!