tds meter

fiorano · #1 03-05-2009, 07:13 PM

so the water coming out of the ro/di is 2 ppm and then it was in my mixing bucket for about 4 days and now its up to 27... does anyone else have this problem. could t be something leaching out of the container???

mike31154 · #2 03-05-2009, 08:49 PM

Might depend on the container, but I doubt it. Is there a powerhead in the mixing container moving the water? How much evaporation do you figure in 4 days? As water evaporates, that would cause any TDS in there to become more concentrated, ergo a higher reading on the TDS meter. I'm just guessing though, I don't have a RODI unit yet.

mark · #3 03-05-2009, 10:09 PM

think everyone has noticed the TDS increase after being stored for a bit.

Lance · #4 03-05-2009, 11:16 PM

Quote:

Originally Posted by mark

think everyone has noticed the TDS increase after being stored for a bit.

Yes, I've found TDS increases quite rapidly in storage. Don't really know why, but it does.

fiorano · #5 03-06-2009, 12:35 AM

ok thanks guys

digital-audiophile · #6 03-06-2009, 02:05 AM

Man, I wish I had 14PPM coming out of my tap!

o.c.d. · #7 03-07-2009, 02:35 PM

I was told or read somewhere that the TDS increases over time because the water is so stripped of everything that is will pull and mix with air. The minute particle in air cause the TDS to rise over time. So all storage water should be in a tightly sealed container.

Myka · #8 03-07-2009, 03:51 PM

Quote:

Originally Posted by Lance

Yes, I've found TDS increases quite rapidly in storage. Don't really know why, but it does.

That is because RO/DI water is very "aggressive", it pulls all sorts of crap out of the air very quickly. This is one of the theories behind why many people believe it is detrimental to our health to drink RO water.

Google "RO drinking water bad", or check this out: http://watershed.net/purified.aspx