depends with the fish but let the clorine out first

Regardless of how wonderful your tapwater is, I would reccomend at least using some kind of water stabalizing solution (StartRight, AquaSafe, etc.) to neutralize the chlorine and mineral levels of the water before adding fish. I have been using StartRight for five years everytime I do a water change, or, in the event of moving, adding all new water. If you use a stabalizing solution, you should be A-OK.

Depends on the fish. Some fishes prefers slightly acidic water wile others alkaline water. Do what you think is right. ^^