Is distilled water safe?

[John]

A voice of moderation from someone with a PhD in chemistry and who has kept and bred amphibians most of his life: I use dechlorinated tap water for water bowls and distilled water for everything else. Rain water contains virtually no chemicals other than dissolved gasses, so distilled water is a manmade equivalent. You can spray it on amphibians with no ill effects - they're not made of sugar and won't melt. However I do recommend dechlorinated tap for water bowls / anything that they will sit in for extended periods of time.