Hello Em Jaye and welcome. Could you please provide a profile 'sketch' for us ... your meds, your AF history, age, any other medical conditions. That way, it's easier to suggest what's appropriate.
As for the TJ water... I looked online to see what I could learn. Found this with customer comments.
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www.traderjoesreviews.com]
Typically the minerals are just trace amounts. We have instructions for a home made version of a concentrate that you can use to make your own alkaline water that also provides magnesium but need to see your profile first.
Jackie