Bizzare Alk Issue - Calling all experts

Discussion in 'Water Chemistry' started by sen5241b, Dec 25, 2010.

  1. sen5241b

    sen5241b

    Joined:
    Feb 14, 2008
    Messages:
    5,029
    Likes Received:
    387
    Location:
    Arlington VA
    I tested Alk in my tank with 2 API test kits, One was brand new, never before used and the other I have used for months and it has worked fine. No matter how many drops of solution I add to the test tube it will NOT turn blue. I added 30 drops and it was still yellow! I immediately went and tested my 20G and the same thing happened. I tested my tap water and after about 4 drops it turned blue. Ph (8.3) and cal (440 ppm) in my 29G seem fine.

    About a year ago the same thing happened but after a couple days I re-tested with the same test kit and then the test accurately measured my alk.

    The only thing in common the two tanks have is that recently I added a lot of baking soda to both tanks --perhaps too much but not an insane amount. I also added calcium to both tanks but Kent cal to the 20G and SeaLab #28 into my 29G.

    Could too much baking soda affect the API alk test?
     
    Last edited: Dec 25, 2010
    sen5241b, Dec 25, 2010
    #1
    1. Advertisements

  2. sen5241b

    cageburn

    Joined:
    May 3, 2010
    Messages:
    1,214
    Likes Received:
    215
    Location:
    chicago,il
    cageburn, Dec 25, 2010
    #2
    sen5241b likes this.
    1. Advertisements

  3. sen5241b

    MushroomXombies

    Joined:
    Nov 14, 2010
    Messages:
    202
    Likes Received:
    17
    Location:
    Texas
    Wierd. My API Alk. test starts out blue and then turns yellow. You sure Alk isnt to low ?
     
    MushroomXombies, Dec 25, 2010
    #3
    sen5241b likes this.
  4. sen5241b

    ccCapt Reef Hacker Moderator

    Joined:
    Dec 23, 2007
    Messages:
    3,302
    Likes Received:
    815
    Location:
    Northeast PA
    If you use any supplement with boron (or a salt that has a high boron content) it can interfere with alk readings.

    "If the boron level is substantially above natural levels, as it is in the Seachem salt mix with 12x normal levels, borate can actually begin to dominate such tests, and makes knowing the real bicarbonate and carbonate alkalinity much more difficult."
     
    Last edited: Dec 25, 2010
    ccCapt, Dec 25, 2010
    #4
    sen5241b likes this.
  5. sen5241b

    sen5241b

    Joined:
    Feb 14, 2008
    Messages:
    5,029
    Likes Received:
    387
    Location:
    Arlington VA
    It is either too low and I misread the test completely or it could be the boron cause I did put a supplement with boron in the tank.
     
    sen5241b, Dec 25, 2010
    #5
  6. sen5241b

    Kwater Chill

    Joined:
    Nov 29, 2008
    Messages:
    589
    Likes Received:
    13
    Location:
    Redondo Beach, CA
    also just to throw this out there, i have never ever gotten an accurate reading out of API tests, i absoutley hate them, thats just me, i have had allmost everyone of there tests and the ones sutch as calcium and akilinity never cooperated with me.
     
    Kwater, Dec 26, 2010
    #6
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.