I didn't know Arrowhead is fluoride free. We have Fuji here too. I was a little concerned about Distilled only because distilling water removes all minerals from the water as well- minerals that are essential to our health and I'm sure the same kind of minerals ratties need too. I just... bottled water is expensive and we have spring water here. The Distilled water here is bottled by the same company which the water from my tap comes from. xD;;
I'm not sure how much fluoride is in it... I do know we have it in ours, but it might not be enough to really freak out about, yet... RO filters are expensive 8( Though, fluoride can be irritating to the skin too... >.< Bah! S'not like we can afford to bathe in bottled water too. lol.