I am in Langley, BC, and our GVRD drinking water is fairly pure to begin with. Tap water is about 50 to 70 TDS here. RO water is around 5 to 7 TDS and RO/DI is zero. So not sure how much difference it makes. Just wondering if the final DI filtration stage does something to the water that is not good for drinking?
Last edited by Reef Pilot; 09-29-2011 at 04:14 PM.
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