Rainwater good for what?

[tylototriton]

So, I don't know if this is a national deal, but my local big name pet store (the one that doesn't have the dollar a gallon sale) had RO systems on sale for $100.
Also, you should be able to use just RO water for your mister. RO should remove most of the salts and whatnot that would likely clog the misting system.
As for rainwater, the pH is questionable. 4 is probably an average, it is definitely worth checking your own. Personally, I use tap water for everything, but I also have a well and live in the boonies. However, it definitely wouldn't work in a misting system.
~Alex

[deeishealthy]

So I might be going out on a limb here, but why not just get a dehumidifier for your house? You should put it in a separate room for your frogs so it doesn't suck humidity from your frog's tank. But the water left in it is distilled. If you have a basement or something that would work fantastically. You wouldn't need to worry about buying distilled water anymore (or as often anyways).

Another option is to get a reverse osmosis system (not cheap though). I'm not sure if it's actually distilled but I'm assuming it would remove enough mineral to be used in your mister.

Great advice and I thank you for it. However a dehumidifier just might leave me as human jerky. I'm already struggling with the dryness in my house. I suffer from eczema and it's so dry and cold right now that I'm having an outbreak, which is unusual as I've had it under control for years.

[deranged chipmunk]

Dee, i think you are starting to over think this. just use declorinated tap water in your mister. clean it out thoroughly once a month with a mild vinegar/water solution (including mist nozzles) and you should have no problems whatsoever. worst case scenario? your nozzles may clog and you'll have to spend about $10 or so for new ones.