Product review (1 stars): I could have a bad batch too
I used the water tester I have for Zero Water and after having and using this fridge filter is testing 1ppm contaminents.  How do I return this product as I am in the 90 day period for moneyback guarantee.  I could have a bad batch too. My unfiltered water tests at 1ppm too so this filter is not working. I am trying the 2nd filter now.