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  1. M

    Hi phosphates in ro/di water.

    Ok I read many post about this but, I have 2 new 150gpd membranes the tds is 9 after the it leaves the last membrane under 80 psi. The Tds is o after the DI resin. the Supply is high @ 144 but is knocked down. I tested the phos today for the first time it was .25 . any suggestions
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