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Discussion Starter · #1 ·
I bought a couple tds meters that measure in "ppm". Someone on this site stated that to get the real "TDS" we need to use a meter that measures in , and forgive my inability to produce the proper graphics...but it looks like a "us"

So I bought a meter that measures in those units....so when a website says for my neocardina neon yellow, blues and RC's that a TDS of 80-200 is acceptable......which unit am I supposed to assume??
 

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Discussion Starter · #3 ·
This is what I thought.
 

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I'm not sure that all ppm conversions are the same. All ppm meters read electrical conductance and then calculate ppm based on a conversion method. The most common is NaCl sodium chloride but there are others like KCl potassium chloride.

But since we are not using our water to make semiconductors, good enough.
 
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