pcfriedrich;1710122; said:I'd go with the JD, and a strawberry pot or something he can hide in and escape from
I used to keep an O with a JD in a 75, they both matured to full size (12" for O, and over 8" for JD), and got along great. Plus, not too many fish can compare with the looks of a mature male JD.
I'd go with a JD over convicts too. You'll have a lot more color in your tank and Jacks and Oscars just tend to get along. I've known quite a few people who had an Oscar and JD in 75's or 90's with great results. Like pcfriedrich said, make sure the jag has a flowerpot or piece of driftwood large enough that he can hide away when he wants and you should be fine. I'd keep 3 of the Silver Dollars too and with lots of filtration.