Yes, I was wrong also, it was 4 bags per YEAR, so much closer to your results. I thought I had measured 18 grains of hardness, but that was 2+ years ago. Will check later this month as I need to turn off (bypass) the system to refill the hot tub, so I will have lots of hard water to check with.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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