Have pedialyte on hand. You can find several electrolyte solutions in the baby isle of the supermarket and any one will do. Keep this in the refrigerator. I like to use this after the first day of hatching because it helps the chick to stay hydrated and helps to maintain proper levels of fluids in the body. After several days I switch to regular filtered tap water.
Some people boil their own water and still others use bottled water.
Use what makes you comfortable. If your water quality is questionable then use an alternative 6. The formula must be fed as close to body temperature as possible. This can easily happen in feedi ng such a small chick. The easiest way for me is to heat water in a clean coffee cup in the microwave.