Softshells are great, but shouldn't be mixed with anything. They're excellent hunters of fish, and I've had them catch and eat fish bigger than them. They're also highly territorial towards any species of turtle including their own, and should be kept solitary.
On the flip side, they're extremely fragile, lacking the defensive hard shell. A bite from another turtle could leave one critically injured. Even the substrate and decor have to be smooth to prevent the turtle injuring itself.
A 60G would be cramped for an adult Softshell, so unless you can afford to upgrade the enclosure later (as I've already mentioned, adding it to your native setup isn't a good idea), I would look at other options.
Best,
Paul
On the flip side, they're extremely fragile, lacking the defensive hard shell. A bite from another turtle could leave one critically injured. Even the substrate and decor have to be smooth to prevent the turtle injuring itself.
A 60G would be cramped for an adult Softshell, so unless you can afford to upgrade the enclosure later (as I've already mentioned, adding it to your native setup isn't a good idea), I would look at other options.
Best,
Paul