"A little osmosis machine"... Where do I find these? Would it fit in my appartement? Can I install it without plumbing if I am only a renter? How often do I need to clean it? How often do I need to change the filter? How many kW and how many liters of wasted water do I need to spend to get half a liter of osmosed water?
Your recommendation may be valid for large volumes long term (like the aquarium or brewing at craft beer scale), but for all the other uses not.
Your recommendation may be valid for large volumes long term (like the aquarium or brewing at craft beer scale), but for all the other uses not.