I have been reading some stuff on black belts and some sources say they will "tolerate brackish and marine conditions". I have kept mine in pure freshwater since I got them, but wouldn't mind making them brackish-I have tons of sea salt around and I could then put my Anableps in with them. I know the BBs have a large range in nature. I also know the definition of "tolerate" varies from source to source, so the question is, will they do better in brackish water?