U have to watch out for the bottled water here in Spain ,,,,, before I got my machine , I tested 7 diff. makes ,,, if that 8 l bottle @ 50 cents was from Mercadona you will find that the ppm is touching 900 ,,,,,, fucking criminal it is , worse than my 850 + tapwater ,,,, the best I came across was a make in Lidl called Sierra Fria @ 60-70 ppm . It's a laugh going to supermarkets cos u can tell who's growing ,,, 2 trolleys full of bottles with a french stick on top ,,,,, ha, ha ,,,,,,,,, anyway , to expensive in the long run for me.