Brackish community fish

[livevil_ryoko]

columbian or black fin sharks are also brackish fish. the interesting thing about them however is they fluctuate from fresh water as juveniles to full blown marine as adults, however they do best with brackish. also read that fluctuating the salt levels effects their demeanor.

[UofMKitty]

As long as the subject of bw conditions have come up, could somebody please state the ideal bw conditions for keeping mollies please? I have recently been blessed by the fish stork with 30 new molly fry and want to set my new 75-gallon up as bw for them. Since this will be my first bw tank, I am collecting any info I can on the subject.