MichaelJ
Member
Hello, I know my RO cartridges and membranes theoretically are due for a replacement, but I am wondering what compounds passes the filter stages when the membranes gets "old" and the efficiency drops? When brand new I usually measure a TDS around 3-4 ppm on the outlet, which is supposedly very good. I now measure around 12-15 ppm. What makes up that additional ppm?
Cheers,
Michael
Cheers,
Michael
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