Ok so I got my new ro filters. I put it sed carbon carbon 75gpd membrane then another 75gpd membrane, it started with 60 ppm out but now 7-8 ppm. It ran for like 15 minutes. How much should it be without the di portion?
And the Di will connect to the clean water coming from both membranes right? I wanted to see why it's reading 8 ppm from the two membranes. Membranes are less then a year in use and haven't used a lot either. Thanks!