Bought a 135, and have just kept a Pleco in it for the last couple of years. Finally stocking the tank. So far, I have 2 Oscars, a Green Terror, the Pleco and 5 Silver Dollars. I'm afraid of overdoing it, so I'm asking for advice. Is this aquarium fully stocked? Can/should I add any more Cichlids (if so, some suggestions would be welcome. LFS about an hour away has a red head Geo that is beautiful). Can/should I add more Silver Dollars? Are there any other South American catfish that could call this tank home for life without overcrowding it?