The link is to a geometric pattern that salt forms at 345 Hz. If a metal plate went around the outside of a pipe and was some where near perpendicular to the pipe, it's possible that it might have the same effect on the salt in water.
If so, then the pipe below the level of the pulse generator could be separated into sections that would keep higher concentration solute from desalinated water.
If something like this could work, then it would need to be found if there is a way to purify the water so that the over all cost would be less than R.O.
http://i979.photobucket.com/albums/ae278/bessler_supporter/345Hz_zps08304b71.jpg