- Joined
- Oct 30, 2008
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- 765
Assuming that most tarantulas in the wild that are drinking water derived from rain or dew, then it's essentially the same as distilled water. Trace minerals are inconsequential.My concern with R/O and distilled water is that it is lacking in important trace minerals. This probably is not problematic for species that obtain most to all water via their prey, but species that do drink water and require that source of trace minerals could be adversely affected. There are also some osmotic balance concerns with pure H2O being imbibed, though I'm not sure how much a tarantula would be affected as I am not under the impression that they do a large amount of drinking. Perhaps some of our board chemists could shed some light on these concerns? I am going mostly on problems seen with R/O and distilled in vertebrates.
If tarantulas are like most terrestrial animals with a digestive system, they're not going to incur osmotic stress from consuming distilled water, since the gut wall is well adept at controlling the absorption of water. Hypotonicity is probably not an issue.