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Discussion in 'Carbon Dioxide (CO2)' started by oswoldy, 9 Sep 2009.

  1. oswoldy

    oswoldy Member

    Messages:
    92
    Deleted
     
    Last edited: 28 Dec 2016
  2. Superman

    Superman Member

    Messages:
    1,804
    Location:
    Cheltenham
    Are you using 4dkh water?
     
  3. squiggley

    squiggley Member

    Messages:
    220
    I had this problem last week and put it down to contamination.

    Make sure you rinse you dc out properly and any thing that you use to fill it i.e. pipette or syringe.

    I think I used my syringe for measuring some dechlor solution. Have labelled now so I know which one is for the 4dkh solution
     
  4. oswoldy

    oswoldy Member

    Messages:
    92
    Deleted
     
    Last edited: 28 Dec 2016
  5. squiggley

    squiggley Member

    Messages:
    220
    I just use tap water and then leave it to dry.
     
  6. Cro

    Cro Member

    Messages:
    103
    I use 4dkH just in case.
     
  7. kevkev

    kevkev Newly Registered

    Messages:
    7
    Is this white film normal? It happened in about 2 or 3 days after installing it for the first time. The glass and reagent are from hong kong via ebay. The 4dkH solution is my own using baking soda.
    DSC_0002_2.jpg
    DSC_0005_2.jpg
     
  8. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    i havent experienced it, but it looks like surface scum (excess proteins).
    it occurs in low flow areas hence hwy you are getting it there,
    it may affect your DC reaction time, so just remove it. not sure how you can fix the problem, because i havent heard or seen it before :!:
     

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