How high is too high for TDS ?

Discussion in 'Water Chemistry' started by Sunshine, Oct 13, 2010.

  1. Sunshine

    Sunshine

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    Before my LFS closed, I used their TDS meter to check my RO water. It was 008. Is that too high ? I have a 6 stage RO system. I changed the filters on the 3 that hang down. It tested 008 after I changed them.
     
    Last edited: Oct 14, 2010
    Sunshine, Oct 13, 2010
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  2. Sunshine

    Bifferwine I am a girl

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    008 is not bad at all. I don't change out my filters until it gets to 040 or so. But my tap water is really bad (it comes out the faucet at 400 to 500). Other people are pickier, and won't use water if it gets above 010.
     
    Bifferwine, Oct 13, 2010
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  3. Sunshine

    Sunshine

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    Great !! Thanks Biff.
     
    Sunshine, Oct 14, 2010
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  4. Sunshine

    Hiker4twenty

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    Sorry to hijack this thread, but this is good info to know. I just tested mine and its at 003 and I started to panic.
     
    Hiker4twenty, Oct 14, 2010
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  5. Sunshine

    Piratefish SPS Freak

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    I have a large commercial system that I use for washing solar panels. Its designed for commercial window washing. Its rated at 100k gallons before you need to change the RO filter. It always reads 000 on the out flow TDS meter.
     
    Piratefish, Oct 14, 2010
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  6. Sunshine

    Sunshine

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    You're not hijacking, and it is good info to know. I was never sure what was acceptable. Now I do.
     
    Sunshine, Oct 14, 2010
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  7. Sunshine

    ccCapt Reef Hacker Moderator

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    It depends on the source water. You don't want less than 95% pure water (98% is even better). If the TDS of the source water is 100 ppm, when you see 5 ppm on the TDS is time to either change the DI resins or the RO membrane.
     
    ccCapt, Oct 14, 2010
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  8. Sunshine

    Hiker4twenty

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    Maybe I should change my filters. My regular top water reads 056 on the TDS meter.
     
    Hiker4twenty, Oct 14, 2010
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  9. Sunshine

    Sunshine

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    Mine is a six stage. What are the 2 on top that look like charcoal ? They are in a clear tube. I was looking at it tonight, it looks more brown.
     
    Sunshine, Oct 19, 2010
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  10. Sunshine

    reeffreak

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    ^That's the DI(deionization) filter.I don't know if it's pure carbon or a combination of carbon and something else.
     
    reeffreak, Oct 19, 2010
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  11. Sunshine

    Sunshine

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    Do those need changed after a certain amount of time ?
     
    Sunshine, Oct 19, 2010
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  12. Sunshine

    Bifferwine I am a girl

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    I change mine once a year when I change the other filters. I think they can go longer, though.
     
    Bifferwine, Oct 19, 2010
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  13. Sunshine

    Sunshine

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    Thanks Reeffreak and Biff.
     
    Sunshine, Oct 19, 2010
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  14. Sunshine

    sen5241b

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    When my TDS is 30 I start seeing small amounts of hair algae.
     
    sen5241b, Oct 19, 2010
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