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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    Works without sunlight, the hotter the surroundings are the more active the yeast becomes, the colder the less active. Mine sits in the sun and it gives it an extra boost during winter as it heats up the bottle and speeds up the process. The valve you can find at almost any local pet shop for around R 15. It will work in a 100liter as mine is only 20 liters less, but I think you would need two bottles then.

    In other news I re-bonded my setup using car silicon and I am impressed, the bond is much more flexible and strong than normal marine:

    [​IMG]
     
  2. larch
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    larch Green fingers

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  3. Puntius
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    Puntius Green fingers

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    Nice DIY CO2 setup dude, I would personally point the outlet of the power head towards the front glass that current looks a bit strong for me.

    Only my 2 cents worth, I can see the harlequins are struggling a bit with that current. It is awesome how strong the flow is of that little pump.

    The plants should just be swaying nicely in the current and at the moment it is a tad strong, only my opinion :occasion14:

    Well done on your CO2 diffuser creation.
     
  4. larch
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    larch Green fingers

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    It is not the small powerhead creating the big amount of flow, it only does about 200 lph. It is my Aquaclear 70 that is doing that, I pointed the flow of the small powerhead in the same direction as the HOB. That way the CO2 gets mixed in properly. As for the flow plants and fish alike seem fine the bubbles just make it seem worse than it really is.
     
  5. Puntius
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    Puntius Green fingers

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    Oh ok I forgot about the aquaclear 70 I had a aquaclear 50 you can increase or decrease the inlet pipe from left to right for the flow have you got this one on full flow?

    yeah I can see your CO2 is getting spread around nicely well done. :icon_thumright:
     
  6. larch
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    larch Green fingers

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    Yeah you can adjust the flow I do it when it is feeding time, rest of the time I leave it running at 100% the rummy noses and Harlequins seem to enjoy swimming against the flow.
     
  7. Puntius
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    Puntius Green fingers

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    Ok cool man enjoy it, since I went planted I have been addicted to plants :hello2:
     
  8. Luis Embalo
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    Luis Embalo Valued Contributor

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    What a lovely power head.. and yes, that looks really strong current.. :)
     
  9. SilverJ87
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    SilverJ87 Algae harvester

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    Maybe I missed it somewhere. How long does it usually take to start the DIY CO2? I am patiently looking forward to see my first bubbles
     
  10. larch
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    larch Green fingers

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    It takes a good while. Did you use cold water or luke warm water to make the mixture? It takes between 1-2 hours to start making bubbles.
     
  11. SilverJ87
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    SilverJ87 Algae harvester

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    Luke water like u told us to use. Hope my bottles are sealing the CO2 from escaping?!
     
  12. larch
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    larch Green fingers

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    Best way to test is by submersing your bottles under water when they are empty and checking for leaks when you put them under pressure. But give it some time before the bubbles start showing up then it will take another while for it to build up enough pressure to start pushing into your tanks water.

    Patients :)
     
  13. SilverJ87
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    SilverJ87 Algae harvester

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    Atleast there is some bubbles on the surface of the 2l and very small bubbles in the 1l on the sides. So something is happening. Just like u say some patience
     
  14. SilverJ87
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    SilverJ87 Algae harvester

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    Checking everything I noticed the 2l bottle was sealed had an small air hole. Fixed it and now I get 1bubble in 1.09min. Almost time for the diffuser to start working.
     
  15. larch
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    larch Green fingers

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    Yeah, not properly sealing the bottles are the main cause of the system not working. It is rarely your yeast mixture. Also the bubble rate will increase as the ambient temperature increases and vice versa. If it is cold it will be slower if it is warmer it will be faster.
     
  16. SilverJ87
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    SilverJ87 Algae harvester

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    Talking abt trial and error. The bubbles created nicely and all of the sudden just stopped. So I am trying another two caps that the airtube is glued instead of using silicone.
     
  17. larch
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    larch Green fingers

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    The trick with sealing the bottle caps is the more glue/silicon the better, other than breaking my one bottle due to me playing around with it I have never had a leaky bottle. Also are you sealing your caps from both sides ea: on the top and on the inside?
     
  18. SilverJ87
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    SilverJ87 Algae harvester

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    My 2nd attempt was successful. Used glue to seal it with and eventually nothing escaped. I only glued it on top. Was afraid of using the flue underneath the cap. Now I get hundreds of tiny bubble through my airstone
     
  19. boebie
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    boebie Green fingers

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    Drill the hole in the cap 0.5-1mm smaller than the diameter of the tube and squeeze/force it through. You will get an airtight seal without messing about with silicone.
     
  20. SilverJ87
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    SilverJ87 Algae harvester

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    I drilled the hole bt still it wasn't air sealed. So I used glue no its 100% working
     

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