so im just doing some research, im interested in either the dat microlepis or the dat undecimradiatus, now from what im reading low salinity brackish water is ok, but these guys do ok in fresh water as well. do these guys prefure brackish when younge and then migrate to more fresh water when older. or is it opposite of what i just said. or does it not realy matter what there in? ive got both a brackish tank set up and a fresh water tank set up. any advise would be cool