As mentioned before if your water has chlorimides in it you would need to use the reptisafe or another additive. Otherwise the water could be deadly for reptiles.
Where I live the water is safe for my snakes but one county south has to use the additives.
Until you know for sure use the bottled water or the additive. I personally would use the bottled water. You can pick it up by the gallon fairly cheap at most discount grocery stores.
Mike Pinkston