I would clean it all up and run it again. There isn't anything mechanically lost in the pump from what I can see. As long as the two bearing surfaces are still good at the ceramic white ball and the impeller vanes are in tack..a little surface scuffing should affect performance at all. If you wan you could probably even use some light sand paper to smooth out the outside of the impeller.

Not sure what chemicals are ok, but as long as it doesn't attack the plastics or metals, it should be fine to clean with as long as you neutralize and rise it well in the end.

Getting a hose barb for your faucet would probably be helpful too:


You can find these at most home improvement centers, helpful for flushing.