TDS meter

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Well, I opted for the dual inline to make calculations a little easier. I setup my RO/DI under my kitchen sink. I also did the calculation and found my system is on at about 54% effeciency. Not good. Anything below 80% is grounds for replacement membrane. I found a great deal on a membrane too ; ) like $63 with shipping from Rocky Mountain Discus (50GPD TFC) Between the TDS meter and new guage kit coming, I'll know well ahead of time before it degrades so much.
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