To start off with the very best conditions for your fish, use a set up conditioner which will properly prepare the appropriate environment.
Things to Consider:
Be safe -- It is better to condition your water before you add your fish, just to be on the safe side. You may be unaware of the chlorine levels in your tap water.
Goldfish -- With their own special formulas, products are available exclusively for goldfish tanks to help quickly prepare water conditions.
Coatings -- Many conditioning products produce a slim coating that will help protect fish from stress, fighting with other fish, and transport.
