Bingo! The RO/distilled demineralizing myth has a grain of truth but is mostly myth. How many people plunk their tads into a glass bowl with distilled water and no food? If you did, then you would see the mysterious deminerlization phenomena. If you are like most people and throw in a leaf or two, maybe a sprig of plant, and actually feed your tads, then you have littel to fear from purified water.Cricket said:In other words, if you just had the tads in the water alone, the RO water would try to pull minerals out of them, but when food (or anything else) is present, the water will pull from there since these solutes are much more readily available.
And by the same token, rainwater should not be assumed safe. Even in fairly pristine areas rainwater can contain a significant amount of ammonia and nitrate. This is not necessarily the result of human pollutants either. It should be remembered that before rainwater trickles into bromeliads, ponds, and streams in the wild, it has already gone through a significant amount of biological filtration that can remove much of these nutrients.peregrine said:I think that the "pure water” concept is ridiculous upon inspection. Rain water is somewhat pure and seems to cause no problems that I am aware of. The idea of pure water would appear misguided for the most part since H2O in its pure molecular form is somewhat of a rarity, outside of the laboratory. When exposed to atmospheric gases (nitrogen, O2 and oxygen, primarily) the PH is adjusted to some degree. Of course if your frogs are in a vacuum than there may be a problem with pure H20 scavenging donors.