its hard to sex them at 2 inches to be sure get one that is about 5'' so it can be easy to sex.... females should get about 12''+ males 16-18" mayb more...i dont think a jag can do much harm to a turtle....
im sure a female in tank will claim a big chunk of the tank....... it all depends on the individual fish.... you can try this with a 180 and see how it goes i wouldnt go any smaller...
For the most part, a jag will be aggressive unless tank is bigger then 6ft full grown. But all fish are different, the only way you can tell is by trying it out.
well i'll tell you from experience that i've had my 2 turtles in my 300g community tank which include arowanas, jag, RTM, couple devils and a dovii and they have been getting along fine for almost a year now.
