Formula help- what water to use?

Thanks in advance to anyone willing to help me with this.

My baby is exclusively formula fed baby. I am very anxious as most can understand about what water to use. Paediatrician has just asked it’s low in sodium.

What brand do most use? (apologies if this offends anyone who’s pro breastfeeding but this wasn’t an option for me)

Also- has anyone managed to get Kendamil in Paris?

Thankyou