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Thread: DIY external co2 drop checker

  1. #1
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    DIY external co2 drop checker

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    This DIY external co2 drop checker is for eurpbrace tank or also known as perimeter bracing.
    I start with used acrylic tube that i have leftover in my 'junk box' and some other connectors from
    various filter spares and a white band sticker.

    These are the spares that i used for this mini DIY project.



    Acrylic tube.


  2. #2
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    Re: DIY external co2 drop checker

    I bend the tube using a flame torch according to my tank perimeter bracing.



    then paste the white sticker on the back of the tube where the 4DKH solution will be stored.


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    Re: DIY external co2 drop checker

    Pictures without and with the white sticker.The sticker is to give a better visual reading of the checker.



    And who can missed the devilish sticker....huha!ha!ha!

    here is how the bottom part look like underwater.


  4. #4
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    Re: DIY external co2 drop checker

    hmm, good effort, but IMHO, i think it will work better is the tube is bigger in diameter... the air needs to contact with the solution to change colour.Thus more contact area= faster colour change....
    Last edited by wongce; 11th Feb 2014 at 21:18.


    Check out my Blog on planted tank, good for newbies ( i am lazy to retype all the info i know, so please click and read below link... i hope you don't fall asleep while reading)
    Link to my Blog

    I am not PERFECT but I am LIMITED EDITION !!! BIG Tank comes with BIG Responsibility...as they makan a lot of $$....lol

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    Re: DIY external co2 drop checker

    Quote Originally Posted by wongce View Post
    hmm, good effort, but IMHO, i think it will work better is the tube is bigger in diameter... the air needs to contact with the solution to change colour.Thus more contact area= faster colour change....
    yes very true but that is all i have left in the box. Guess, how many hours for the 4DKH solution to turn green??

  6. #6
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    Re: DIY external co2 drop checker

    Quote Originally Posted by zerofighterx101 View Post
    yes very true but that is all i have left in the box. Guess, how many hours for the 4DKH solution to turn green??
    wah, hard to guess leh bro... 4 hours? lol just a lucky guess...


    Check out my Blog on planted tank, good for newbies ( i am lazy to retype all the info i know, so please click and read below link... i hope you don't fall asleep while reading)
    Link to my Blog

    I am not PERFECT but I am LIMITED EDITION !!! BIG Tank comes with BIG Responsibility...as they makan a lot of $$....lol

  7. #7
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    Re: DIY external co2 drop checker

    Quote Originally Posted by wongce View Post
    wah, hard to guess leh bro... 4 hours? lol just a lucky guess...
    4 hours!! i wish.. 12hrs ....
    Because of the long neck and small diameter it took quite some time for the air to make contact with the solution.

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    Re: DIY external co2 drop checker

    Wah sai...12 hours ah.... haha


    Check out my Blog on planted tank, good for newbies ( i am lazy to retype all the info i know, so please click and read below link... i hope you don't fall asleep while reading)
    Link to my Blog

    I am not PERFECT but I am LIMITED EDITION !!! BIG Tank comes with BIG Responsibility...as they makan a lot of $$....lol

  9. #9
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    Re: DIY external co2 drop checker

    Nice DIY, as usual! yes as what wongce mentioned, larger surface area for the solution to change colour. The diameter of the air column does not matter as much.. But with a bigger diameter tube, it gets harder to bend it..

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