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03-08-2008, 05:28 PM
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#1
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Little Fishy
Join Date: Oct 2007
Location: Lexington, SC
Posts: 180
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TDS @ 21- time to change?
I have an Air Water & Ice 5 stage filter unit and the water out was reading 0 when I installed it. Now the TDS is at 21. I haven't ran 100 gallons of RO/DI water yet. Could it be time to change the filters already?
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03-08-2008, 05:32 PM
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#2
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BIG SMELLY MOD
Join Date: Dec 2004
Location: Livingston Parish, Denham Springs, Louisiana
Posts: 16,909
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What is the reading going in, If the water is super high going in then it can be time to change,
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Vince aka VINNIE
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03-08-2008, 05:46 PM
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#3
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.
Join Date: Dec 2005
Location: bend, oregon
Posts: 11,030
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whats your source TDS??
you at a minimum need to change your DI and see what that does for you
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I like to glue animals to rocks and put disturbing amounts of electricity and saltwater next to each other
Zoa and paly pics HERE
SPS pics HERE
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03-08-2008, 06:33 PM
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#4
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Little Fishy
Join Date: Oct 2007
Location: Lexington, SC
Posts: 180
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OK, the water going in is at 68. I used another cup to catch the water and test it and it read zero. Tried it again in the original cup and it read 21, so I think the cup may have something in it. I then tried the new cup again and got 10, so maybe something leached out since it is plastic. I think the first thing I am going to do is order an inline meter instead of the handheld. Where is a good place to get a reliable one?
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03-08-2008, 06:40 PM
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#5
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.
Join Date: Dec 2005
Location: bend, oregon
Posts: 11,030
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handhelds are plenty reliable.
the key to testing your oputput water is a absolutely clean glass container to collect the wter to be tested for TDS in. even the tiniest amount of residual saltwater or dust or anything int he glass will skew your results
im willing ot bet you are still at or real close to zero. get a perfectly clean glass to collect the water in right out of the RO/di unit after it has been running a while...and test again
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I like to glue animals to rocks and put disturbing amounts of electricity and saltwater next to each other
Zoa and paly pics HERE
SPS pics HERE
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03-08-2008, 06:42 PM
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#6
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Little Fishy
Join Date: Oct 2007
Location: Lexington, SC
Posts: 180
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Thanks. I will try it again. I also noted the water temp is about 64 degrees, cold spell here right now, would that cause them to creep up a little?
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03-08-2008, 06:43 PM
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#7
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.
Join Date: Dec 2005
Location: bend, oregon
Posts: 11,030
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i run mine off a well at 45 degrees....it just slows the output...doesnt affect the quality
__________________
I like to glue animals to rocks and put disturbing amounts of electricity and saltwater next to each other
Zoa and paly pics HERE
SPS pics HERE
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03-08-2008, 08:54 PM
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#8
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Big Fishy
Join Date: May 2007
Location: nashville
Posts: 948
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remember when you first turn the r/o d/i unit on you need to waste 1 or 2 gallons.
this could be the reason for your wild readings.
With TDS that low to start with your R/O unit itself should make the water in the low 10's if not lower. you need to check and see what the TDS is after the membrane. When is the last time you changed your DI?
If it was a new unit when you bought it it should be way to soon to replace membranes or filters.
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03-08-2008, 09:00 PM
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#9
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I've got the REEF rash!
Join Date: Nov 2004
Location: New Jersey
Posts: 25,608
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Take a reading before DI I bet you need to change the DI.
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03-09-2008, 01:27 PM
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#10
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Little Fishy
Join Date: Oct 2007
Location: Lexington, SC
Posts: 180
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The unit was new and has run about 100 gallons or less. I did get another cup to catch the water to test and it read 4, so I think my issue is the container other than the water.
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03-09-2008, 01:31 PM
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#11
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So Where Is "Dimples"???
Join Date: Dec 2007
Location: Kansas City, MO
Posts: 1,347
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I tested mine in a cup that had a tiny amount of salt residue...it tested ~050...I redid the test in a clean cup and it tested 002...I'll bet the cup is your culprit.
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