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I seem to be having a problem with my ro water this weekend. So I'm gonna go buy some water from the store. Do I want to buy spring water or distiller water?
I believe you want distilled. Typically spring water is filtered before bottling but I think you have a better guarantee with distilled water that all the "stuff" you want removed from the water actually has been removed. I believe that you can actually buy RO/DI water from the lfs, but I would call them first to save yourself a trip.