Thread: At what PPM do you change media on your RO/DI unit
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  #13  
Old 06/27/2007, 01:09 PM
alizarin alizarin is offline
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Join Date: Mar 2005
Location: Tampa, FL
Posts: 615
I used plain RO water for years with zero problems and that was at least 10ppm. Why would you change it at 1ppm?