[Timezone Detection]
Create Account - Join in Seconds!

User Name: Email Address:
Human Verification

What is one of the colors on a clownfish? (hint there is a clownfish on the CR logo in the top left corner of the page.)

TDS readings?


Bookmark and Share
Results 1 to 9 of 9
  1. #1
    MizTanks - Reefkeeper
    Join Date
    Oct 2009
    Location
    U.P. of Michigan.
    Posts
    7,342
    First Name
    Jamie
    Awards Photo of the Month - October 2012 Photo of the Month Post and Reply Award - Winner of the first PAR Contest. Monthly Giveaway Winner

    Default TDS readings?

    Bought me a little TDS meter. Tested my tap water=157ppm. I've no idea what this means. I'm going to assume this is high~right?
    There's nothing like being a Reefer! www.upmmas.com

  2. #2
    AZDesertRat - Reefkeeper
    Subject Matter Expert
    Water Treatment

    Join Date
    May 2010
    Location
    Phoenix AZ
    Posts
    367

    Default

    157 is a little better than average TDS which is around 250 nationwide.
    Its certainly not something I would put in my reef tanks but depending on hwta the 157 is made up of its probably fine for drinking. Thats the problem with TDS, its a measurement of everything electrically conductive in the water so does not speciate or identify anything in particular. It could be calcium and magnesium or it could be phosphates, silicates, nitrates, copper, iron or any number of other things.

    The beauty of a RO/DI system is it removes everything and is not selective so a reading of 0 TDS means you eliminated it all and are starting with fresh pure water again.

  3. #3
    CableGuy - Reefkeeper CR Member
    Join Date
    May 2010
    Location
    SCS,MI
    Posts
    361
    First Name
    Adam

    Default

    157 really isnt too bad...

    Where I am it is ~90, but Detroit has some of the cleanest water around.

  4. #4
    mcleodm - Reefkeeper CR Member
    Join Date
    Apr 2011
    Location
    Wixom, MI
    Posts
    75
    First Name
    Michael

    Default

    Quote Originally Posted by CableGuy View Post
    157 really isnt too bad...

    Where I am it is ~90, but Detroit has some of the cleanest water around.
    I get about 110 to 120 in wixom. 157 is pretty good because you won't be replacing your filters as often as others

  5. #5
    Heidi - Reefkeeper
    Queen of Chat

    Join Date
    Dec 2010
    Location
    Michigan
    Posts
    979
    First Name
    Heidi
    Awards Fishbowl Drawing Winner

    Default

    Wow ours is really bad over here and even the RO filtered water at the grocery store still reads phosphates with my API test. I the TDS here is 180 from the tap, 155 from our britta (just incase anyone wondered). Those fridge filters are so expensive and yet all they take out is 30...hmmm, I love my ROdi!

  6. #6
    AZDesertRat - Reefkeeper
    Subject Matter Expert
    Water Treatment

    Join Date
    May 2010
    Location
    Phoenix AZ
    Posts
    367

    Default

    Prefilters and carbons blocks have very little to absolutely nothing to do with TDS so get changed every 6 months regardless if you have 50 TDS or 5000 TDS. They are there to protect the RO membrane from suspended solids, big stuff like sdeiment, silt, particulates, sand and colloidal materials in the .5 micron range and larger plus chlorine in the case of the carbon block. The membrane removes the smal stuff, dissolved solids in the 0.0001 micron range.
    Hobbyist grade saltwater test kits are not designed to test phosphates or other things in ultrapure water like RO or RO/DI so mean nothing. It takes lab grade instruments to test RO/DI water so your best friend is a good handheld TDS meter. I prefer the HM Digital COM-100 as it is 10x more sensitive and accurate than the normal meters and is stil only around $59.

  7. #7
    CR Member
    Join Date
    Nov 2010
    Location
    Baroda, Michigan
    Posts
    84

    Default

    My TDS readings out of the tap pegged my meter which is calibrated up to 450! So who knows how high they really are! Needless to say but my filters and di don't last very long!

  8. #8
    nate_newton - Reefkeeper CR Member
    Join Date
    May 2010
    Location
    St. Joseph, MI
    Posts
    511
    First Name
    Nate

    Default

    Quote Originally Posted by Heidi View Post
    Wow ours is really bad over here and even the RO filtered water at the grocery store still reads phosphates with my API test. I the TDS here is 180 from the tap, 155 from our britta (just incase anyone wondered). Those fridge filters are so expensive and yet all they take out is 30...hmmm, I love my ROdi!
    Interesting, ours is around 120 on the basement coldwater washer line.

  9. #9
    AZDesertRat - Reefkeeper
    Subject Matter Expert
    Water Treatment

    Join Date
    May 2010
    Location
    Phoenix AZ
    Posts
    367

    Default

    Mine in Phoenix is never less than 650 and it can get over 1200 in parts of the Valley.

Similar Topics

  1. Salt & Water DI readings out of tap ?
    By jerryc in forum Basics
    Replies: 2
    Last Post: 05-18-2005, 01:26 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

About CaptiveReefs

    If you are interested in learning about reefkeeping or have a problem with your reef, our reefkeeping community is here to help. Feel free to ask a question or search our site. We have lots of experienced reefkeepers that are willing to provide free reefkeeping advice!

    Besides being a great resource for all levels of reef aquarium hobbyists, CaptiveReefs is a social experience that will enhance your enjoyment of reefkeeping. CaptiveReefs is committed to connecting reefkeepers with the support and information they need to grow beautiful coral reef aquariums.

Information

Connect with Us