If I do ever get one i will put some salt like In between fresh and brackishYeah they can tolerate fresh right through to full marine water.
In the wild they are predominantly found in salt water though. Whether that be brackish in rivers and estuaries, or out in full salt around offshore reefs.
In Aus there would not be too many living in full fresh water.
So that’s why I have gone down the brackish route.
Each to their own though.