It may take a while to get a head of it. Just keep up with regular changes. If you are talking about the water at the dispensers then yes, but I would test it prior to using any of it. Sometimes you get lucky with the quality and sometimes you don't.
The b-ionic question. If your tank is not using it then you don't need to dose it. Dosing too much of anything can cause issues. Regular testing of the water will give you an answer if your tank needs adjustment to calcium and alkalinity issues. I have in my own experience found that if I did small regular changes (I do two 3 gallon changes per week on my 30g) I have no need to add any extra supplements to the water.
John
"Critics are men who watch a battle from a high place and then come down and shoot the survivors." Ernest Hemingway