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RO questions

Discussion in 'General Discussion' started by gravattj, Apr 28, 2009.

  1. Apr 28, 2009 #1
    gravattj

    gravattj Inactive User

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    I have an RO unit without DI.  I just picked up a TDS meter and had a reading of 14, but after replacing the filters have a reading of 9. 
    Questions:
    * is 9 good, bad, or ok?
    * I have had the unit for about 1 year.  If I replaced membrane, would the TDS reading go down?
    * What would the addition of a DI unit get me?  A lower TDS reading?
    * Should I worry about chlorine? 
      * Does chlorine content increase as the membrane gets older? 
      * Does chlorine content increase as the filters get older?
     
  2. Apr 28, 2009 #2
    xmasia

    xmasia Well-Known ReefKeeper

    376
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    well with no di 9 is good if you were to have a di it would be zero which is what you want you want zero tds come poeple go to 5 before they change some go more some change at 1.i have a ro di before thr rodi i have a 250 tds after ro i get 32 tds and after di i get 0.
     
  3. Apr 28, 2009 #3
    Troy

    Troy Experienced Reefkeeper

    1,025
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    * 9 is ok, but I would shoot for 0
    *it the membrain is over a year old, it is probably getting time to replace it
    *DI would probably make the TDS go down. I would get the DI addition, it would be alot better for you tank
     
  4. Apr 29, 2009 #4
    Bela

    Bela Inactive User

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    Aren't DI membranes supposed to last much longer than the other filters as long as they are flushed properly?
     
  5. Apr 29, 2009 #5
    Eric West Des Moines, IA

    Eric Experienced Reefkeeper

    1,170
    West Des Moines, IA
    Ratings:
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    Posted By lordofthereef on 04/29/2009 05:07 AM
    Aren't DI membranes supposed to last much longer than the other filters as long as they are flushed properly?
    I think it's around 18 months for a "general" rule.
    -Eric
     

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