It is a 60 gal tank-- want to add a 125 after the first of the year. Right now just looking for something to share with an oscar. In the past (almost 20 years ago), I had a 125 with one oscar, one very large pacu, 2 JDs and a large pleco. Got them all as babies, and everyone got along great. Never had an issue. Also had a 90 gal tank with 1 GT, 2 generic catfish (which grew to over 2 ft in length), 2 large tinfoil barbs and some smaller africans. Once again, no problems. These set-ups were when I was in college and relying on the advice of petshop workers, as there was no internet for easy researching. I managed to have healthy tanks for over 5 years in my ignorance cloud and never lost a fish despite the improbable tank mixes. One day, for no apparent reason, my ex-husband decided to dump a bunch of live feeders in both tanks. Within two weeks, everyone was dead and I was devastated at this sudden end to my aquarium success. I lost my will to keep fish after that.
Now I am older, smarter, and ready to give it another go. Starting slow, but doing it right. Thanks to everyone who posts to me with ideas and advice.