Title: Must have for Humidifiers!
Product review: This is easy to use, and it works! Prevents or gets rid of that mildewy smell that happens within a couple of days. Just under a capful works in my large tank. Precise measuring isn't needed. I think the label warning about it being caustic mentioned in other reviews is more about legal issues than anything else. I'm not saying you should bathe in it, but I've gotten drips on my hand and just rinsed it off - no damage. Think about it - if it was too dangerous, they wouldn't let you spew it into the air to breathe it in!
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