Seltzer and club soda are different products; club soda has sodium added (if it naturally has a high mineral content, then it is called mineral water instead of

Seltzer and club soda are different products; club soda has sodium added (if it naturally has a high mineral content, then it is called mineral water instead of club soda.) Seltzer on the other hand is simply carbonated tap water. Personally I used to prefer seltzer but now drink plain tap water. For each their own though.