I would asume no because it most likely has metal parts in it that would leach and rust with salt water. I use quiet one pumps they are good so far and have had them running for over a year with no problems. They are also on the less expensive side and got them from drsfostersmith.com
It is looking good can't wait till you get some water flowing. Good luck.
ok scratch that, i just saw how much more water they pumped at a higher head distance and was hoping to save some cash :( Ill check out dr foster smith!
So how do i decide on an overflow and return pump that match? is it possible to have too much flow going through the sump?