larch's DIY CO2 Setup for 80 Litre Tank

Discussion in 'D.I.Y.' started by larch, May 26, 2013.

  1. larch
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    larch Green fingers

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    Bought myself a ISTA CO2 Indicator for the shit and giggles to see what my CO2 levels are as I have never checked them since starting up my DIY CO2:

    [​IMG]
     
  2. larch
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    larch Green fingers

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    So I am working on version 4 of my DIY CO2 setup now. And instead of drilling holes and hap haphazardly using silicon to keep it in place, I am using taper ended screw in connectors from a sprinkler system. I made tiny holes in the bottle caps and then screwed these into the cap and used some contact glue after screwing them in and that is it:

    [​IMG]

    And since my CO2 indicator is telling me that my 2 litre bottle is producing too much CO2 I will be switching to 1.5 litre bottles:

    [​IMG]
     
  3. Joshua Tree
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    Joshua Tree Valued Contributor

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    The glue becomes brittle/dry and separates from the caps...
     
  4. larch
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    larch Green fingers

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    Depends on the glue, epoxy does not do that.
     
  5. larch
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    larch Green fingers

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    So my new caps did not turn out the way I wanted so I kept making a few till I got it the way I wanted and got all the issues and kinks sorted out, will post new images as soon as I am done:

    [​IMG]
     
  6. zaqwsx15
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    zaqwsx15 Noob

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    hi Larch

    what do you call those black plastic things in SA?

    i went to my local hobby shop and asked them for fuel-line bulkheads for model aeroplanes (thats what i know them in the UK as) and they stared at me blankly.

    ive set up DIT CO2 like your version 1...struggling to get good bubbles though.
     
  7. larch
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    larch Green fingers

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    You go to any Builder Warehouse and go to their irrigation department and ask for barbs and bars with screw they sell them in packets of 5 and they go for R6 a pack. The barbs you will be using for were your mixture bottle goes into your second bottle the outlet on your first bottle will use the barb with screw, the same will be used were it goes from your second bottle too your tank.

    How are you mixing it?
     
  8. larch
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    larch Green fingers

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    I also modified my mixing method you should try the following:

    1. Take your 2 litre bottle fill it halfway with lukewarm tap water, add two table spoons of baking soda, then add two cups of sugar (white). The put on a cap and shake the mixture till all the sugar has dissolved.

    2. Then take a 500 mill coke bottle and fill it up enough with lukewarm water so that there is enough space for you to shake it so that the air can get mixed into it. Then add 4 heaped tablespoons too the bottle and one tablespoon of yeast, close the bottle and shake it vigorously in 2 minute intervals for 10 minutes. And between the intervals leave the cap un-screwed so it gets air. After that add it too the 2 litre bottle and shake. And put everything together again.

    Try this method and let me know if it works.
     
  9. zaqwsx15
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    zaqwsx15 Noob

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    im going to give that method a try

    i thought it was my yeast...not being active. ive tried brewers yeast from dischem (the heathy food section...it looks like powder) and ive just got a pack of R5 instant yeast from PnP, it looks like small granules.

    will report back
     
  10. larch
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    larch Green fingers

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    The brewers yeast you get from Dischem wont work try finding these at Pick `n Pay or Fruit and Veg City:

    [​IMG]

    That is the brewers yeast you should use.
     
  11. larch
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    larch Green fingers

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    So I am finally done with my version 4 of my DIY CO2 build and I am really impressed with how it came out, it looks neat and professional:

    [​IMG]

    [​IMG]

    [​IMG]
     
  12. larch
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    larch Green fingers

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    Bought a 2 valve switch for my DIY setup so that I do not need to disconnect the line when I switch it off:

    [​IMG]
     
  13. zaqwsx15
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    zaqwsx15 Noob

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    with the two valve switch you will just close off the tank line and let the CO2 escape into the air instead of your tank?

    looking good dude.
     
  14. larch
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    larch Green fingers

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    Yeah that is the idea. :)
     
  15. larch
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    larch Green fingers

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    So I was racking my brain for an idea how too keep my bottles stable and I came up with this:

    [​IMG]

    I took some pieces of wood I had left and cut a small platform and then cut two square holes in the platform and then two smaller pieces I nailed onto the bottom for feet. The bottles fit in snugly, now I just need to sand it down and give it a few coats of varnish:

    [​IMG]
     
  16. Duran1
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    Duran1 Algae harvester

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    good thread.. been following it:)

    pHish_man gave me this idea works really well.. bubbles are a lot smaller then that of the normal air stone.. maybe give this a try..
    [​IMG]
     
    Last edited by a moderator: Apr 11, 2014
  17. larch
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    larch Green fingers

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    This is my final build of my DIY system, I don't think I can improve it any more than I have now. But like they say in DIY there is always room for improvement. So my next build instead of using a 2 litre bottle is using a 1.5 litre and instead of directly glueing the air tubing into the hole in the cap I used barbs and bars with tapped screws (The type they use in irrigation systems) which I bought ad Builders Warehouse and screwed them into the cap and clued them with a bit of contact glue just to be sure.

    I then I took some pieces of wood I had left and cut a small platform and then cut two square holes in the platform and then two smaller pieces I nailed onto the bottom for feet. The bottles fit in snugly, I sanded it down and added a few coats of varnish too it. I then bought a 2 valve switch which I attached too my little stand using those nail clips you usually use to attach your telephone wiring too wooden skirting and this is the end result:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  18. larch
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    larch Green fingers

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    So after waiting for my old DIY setup to run out of steam I finally setup the new one today:

    [​IMG]

    [​IMG]
     

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