Reverse osmosis water is fine. It's essentially distilled water, so lacks minerals and salts. Reverse osmosis is just a different way of distilling water from heating it and condensing the vapor. However, these salts are quickly replaced once the water comes in contact with the soil or even air. While you wouldn't want to soak a frog in distilled water, because, having a permeable membrane for skin, it may lose electrolytes to the solution and take in too much water if its active transport system for controlling this can't keep up, it's perfectly all right to use reverse osmosis water for misting and even circulating waterways with rocks, plants and soil. Distilled water does not remain distilled for long, once in contact with any minerals and salts. And there is no practical difference between the processes of distillation.

What was the source of the advice not to use it? Were any reasons given?
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Patty
Pahsimeroi, Idaho

Dendrobates: auratus blue, auratus Ancon Hill, tinctorius azureus, leucomelas. Phyllobates: vittatus, terribilis, lugubris. Epipedobates: anthonyi tricolor pasaje. Ranitomeya fantastica, imitator, reticulata. Adelphobates castaneoticus, galactonotus. Oophagia pumilio Bastimentos. (updated systematic nomenclature)

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