I have a new 90 gallon fish tank that I'm working on setting up. I've decided I would like to have larger and fewer fish. I'm interested in Oscars. Now I've heard that you either keep one Oscar or you keep six because of their aggression towards each other. Since I only have 90 gallons and I don't plan on getting a several hundred gallon tank, I guess I'm only going to get one. What kind of tank mates would be suitable, besides Plecos? Any other information or advice you guys have from experience would be very valuable to me. Thanks