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I was skeptical that water could change my coffee that much, but the clarity in the cup is genuinely noticeable. The dropper bottle is precise, so dialing in different mineral profiles takes about two minutes.

The dropper bottle makes it dead simple to add just a few drops to a liter, and I noticed the coffee's clarity immediately—brighter acidity without any bitterness. It's become a permanent step in my morning brew routine, and the results are consistent every single time.

Finally, a simple way to control water chemistry without a lab setup. Adding a few drops per liter noticeably brightened the acidity in my pour-over, and the clarity of the cup was a huge step up from tap water. I’ve already got a second set for my espresso machine.