Originally Posted by Tom Kershaw
The one I went for was the Elemaris XL, with a 2 litre capacity (£24.67/Argos).
It takes the newer Maxtra carts. which their blurb says reduces, chlorine, carbonate hardness, aluminium, heavy metals, certain pesticides and organic impurities. Note they say reduces, not removes. Anyway it sure does taste nice.
For complete removal of impurities you would need a deioniser like the one Rob linked to. I have something similar but as I said because the running costs are expensive, the carts I use are over £40!!! I use the Brita more.