Oh I sm soo sorry! I didn't realize you had asked me a question before lol my bad
I have heard of people keeping them in entirely fresh water, most say they won't do well long term in fresh water. I actually have Jeff in between in a freshwater dosed on the high end of therapeutic with aquarium salt, he's doing great and his tank mates don't seem to mind either. Just have to be careful cuz there are fish namely some cories and plecos that can't tolerate that much salt. My BNP is just fine though.