this post was submitted on 01 Jan 2024
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Yes it's wasteful. Do what I did, save yourself the money and start making your own water, it's extremely easy and costs next to nothing. Check out https://www.tinkercoffee.com/blog/2017/11/9/thats-some-high-quality-h20
There's also the "pavlis" recipe, or simply the potassium bicarbonate mix:
Make a concentrate of 10 grams per 100 mL, then use 1ml of concentrate per 1 liter.
Be sure to keep the concentrate in the fridge to slow down the growth of any civilizations, though. A 100ml batch lasts me about 6 weeks at roughly 4 shots a day.