-
filtered still has limescale, and it's about the minerals in the water which a filter can't add.
-
I used to use a filter as our water is very hard in Norfolk but swopping to Tescos Ashbeck made a lot of difference to the brightness of the coffee. Wouldn't go back now.
I was concerned about the environmental impact of bottles and transportation but I'm now not sure if that is any worse than using a filter for a month and then chucking it (and the processes and chemicals used in making those).
How does bottled water fare vs filtered?