After you dip rinse it. Then rinse it again. And then rinse it again. Then finally you can rinse it again. After that rinse it two more times.
You do not want even a trace of this stuff to get into the tank. Just ask my shrimp, pods and most of my bristleworms. Oddly enough it didn't seem to have much of an effect on my starfish other than making them float around a little bit. Snails, hermits and fish didn't seem to notice either.