How often do you change your R.O. filters?

Discussion in '3reef Site Polls' started by Matt Rogers, Jul 2, 2005.

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How often do you change your R.O. filters?

  1. Every 3 months or less.

    0 vote(s)
    0.0%
  2. 6 months.

    18.2%
  3. Once a year.

    31.8%
  4. Other.

    13.6%
  5. I don't have an R.O. filter.

    36.4%
  1. Matt Rogers

    Matt Rogers Kingfish Staff Member

    Joined:
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    13,466
    Location:
    Berkeley, CA
    Ok.. this is an area I tend to slack on... I haven't changed my R.O. filters (sediment, carbon, DI) in over a year. But I just did a TDS test and it is still coming out with a 0 reading with the water from my SpectraPure R.O. filter. However I am changing them this weekend because I have been getting diatoms the last couple of weeks. (hmm silicates?) But still 0? My local water must be pretty good. :eek:

    So how often do you change your R.O. prefilters?
    How often do you change the R.O. membrane itself? (I hear those last a couple years.)

    matt
     
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  3. inwall75

    inwall75 Giant Squid

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    Matt,

    You're going to get answers all of the board from this question. Some people like Craig Manoukian have very good tap water, other people like Nikki (NaH2O) have TDS of 550. I fall kind of in the middle.

    When it comes to the silicates, by any chance did you have any sponges die recently? If it was a large sponge or the death of a number of smaller sponges, that would explain the source of the silicates.
     
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  4. Matt Rogers

    Matt Rogers Kingfish Staff Member

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    13,466
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    Berkeley, CA
    Yeah I figured as much.. but I am really curious what others are doing.. so you change yours once a year too?

    COme to think of it... I got diatoms shortly after my Tunze turbelle pump sucked my coral beauty to death and I didn't notice for a few days that he was stuck to it. :p
     
  5. inwall75

    inwall75 Giant Squid

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    Bummer...sorry for your loss. :(
     
  6. Matt Rogers

    Matt Rogers Kingfish Staff Member

    Joined:
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    Thanks.
    So when do you know it's time to change your RO filters?
     
  7. Gresham

    Gresham Great Blue Whale

    Joined:
    Nov 7, 2002
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    Location:
    SF/Monterey Bay Area, CA
    When the particulate is discolorred.
    When I see diatoms (change our DI).
    Every 4000g on my carbon block.
    Every 100og or so on my other carbon.
    My membrane is on 7 years :D still 0 tds ;)

    FWIW, Matt's water company, East Bay Mud, has some of the best water quality in the states. They've won numerous awards for excellence ;)
     
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  9. greyhawk

    greyhawk Astrea Snail

    Joined:
    Jun 18, 2005
    Messages:
    48
    Location:
    Memphis,TN
    out of my tap the tds is 65 so i guess thats pretty good
     
  10. mmakay

    mmakay Feather Duster

    Joined:
    Aug 17, 2004
    Messages:
    222
    Location:
    Santa Clara, CA
    No RO for me! I use one of those big Kati/Ani set-eps. When the Kati shows about 75% depleted, I recharge. (It's the color-change type.) That usually amounts to 200-300 gallons. The tap water here is around 400ppm, though, so any system is going to suffer.
     
  11. kb.bear

    kb.bear Peppermint Shrimp

    Joined:
    May 17, 2005
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    414
    Location:
    Riverside, RI
    I have had my RO 3 years 80 in 0 out ,added DI 6 mos ago, no changes needed yet and I make about 300 gals a mo.
     
  12. Birdlady

    Birdlady Finback Whale

    Joined:
    May 8, 2004
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    2,716
    Location:
    PhillySuburbs, Pennsylvania
    150 in and 0 out....
    Have not changed them yet, coming up on a year in Sept./Oct.