Hi. I live in a hard water area. We use a water softener to reduce the water hardness. Therefore I cannot use tap water to make babies bottles as its too high in sodium. I'm thinking of getting a reverse osmosis filter as this will remove the sodium and other potential contaminants. Initial cost is 375 to install plus 140 per annum to change filter. Has anyone any experience of using these ? Are they worth the expenditure ? I'm currently buying water from lidl to use for babies which is a bit of hassle but I've no option. Also my water doesn't taste great so I'm worried it might not be the best for the adults in the house even though we use it all the time.